There are some distinctive backs featured on my “POST CARD” Clues page. There is further but less-useful information on the Unsolved page.
I have removed the punctuation from the wording on the cards. &s have been ignored.
David Schofield’s excellent site Publishers’ logos on old postcards will help identify the publisher from the logo for European postcards dating before 1939, concentrating on publishers who were not exclusively producing topographic postcards.
| On the card | Publisher |
|---|---|
 logo of a fountain in the form of a face in a circle | Brunner |
 | entirely unsolved |
 | unsolved |
| PHOT A B & Co. NANCY in a roundel | Bergeret |
| A B à Versailles | |
AGS  | Gombert |
| ADN | Dugas |
| AE | Eliasson |
| AH | Holzman |
| AHH in a rectangular box | ? Heintz-Jadoul |
| AJK Bergen | Karlsen |
monogram: A above L | Aristophot |
Monogram of A bisected by L in the corner of the photographs of Italian cards  | unsolved |
| A & M B | Albrecht & Meister |
| AMAG | Albrecht & Meister |
| AN Paris | Noyer |
ANC | American News Company |
 | American News Company |
AP in a circle   | Cormault & Papeghin |
| red anchor between the words Post and Card  | Walker |
| APPS | Automatic Photo |
A P & S Co, B  | unsolved |
AS with fleur de lys between them  | A Saint-Just |
| ASM [monogram of A & S intertwined above M] | Scrocchi |
| A ST INC | Arthur Strauss |
A S above W  | unsolved |
ATC  | unsolved |
autochrom | Glaser |
| Auty Series GH W | Hastings |
| A V Kbh | Vincent |
| BAJ Dresden | unsolved |
BF over C | Braune Franssen |
BFC over JHB | Braune Franssen |
| BF Paris | Berthaud Brothers |
| BF CHALON-s-SAONE | Bourgeois Brothers |
| BJC Paris | unsolved |
| BKWI | Kohn Brothers |
| B M & Co | Budtz Muller |
| BP | Bazar do Povo |
| B & R SERIES B & R’S CAMERA SERIES | Brown & Rawcliffe |
| B & R in M | Beger & Roekel |
 B & S B in a cartouche, the S twice as big as the other letters. | unsolved |
| BURRO SERIES | Thayer |
| BW | unsolved |
| CA & Co logo | Carl Andelfinger & Cie, Munich |
| ‘Castle’ Series | George Stewart |
CCCC round &  | Collas |
| CGL | Carl Garte |
CJ | unsolved |
CJKVS  | Josef Kasseroller |
| CJV | unsolved |
| CKZ | |
CLC with or without complex anchor logo with intertwined initials J D and a superimposed C on the anchor. | L’Hopital |
| CM with or without Paris | Malcuit |
| CM Edit a St-Cloud | Maindron |
| Collection Ideale PS | Satragno |
| “La CPA” Paris | Carte Postale Artistique |
| CPI | Columbia Polytechnic Institute |
| CPN | Comptoir de Phototypie |
| Crescent Series | unsolved |
| C St | Stenders |
| CT & Cie a G | Clement Tournier & Co |
CTCo monogram CHICAGO | Curt Teich |
| CTK [monogram in scalloped shield]  | Carl Kunzli-Tobler |
| CVC | Van Cortenbergh |
| DGF | unsolved |
| DK & Co L | Dobbs, Kidd & Co |
| DL | unsolved |
| DRGM | Deutsches Reiches Gebrauchs Musterschutz – German protected patent design |
| Dr von R & J in D | printed by Rommler & Jonas in Dresden (Dr: abbrev for Druck) |
| DT, Edit | Trenkler |
| DTCL | Trenkler |
| DT Edit Lourdes | De Torres |
| DT Editeur | De Torres |
| DVD | van Dantzig |
eagle landing on a pedestal surmounting 31253 logo  | Gluckstadt & Munden |
eagle in flight above a shield of the stars and stripes | Illustrated Post Card Company NY |
| Ed Helio BF ALGER | Berthaud Brothers |
| Ed VG Bruxelles | V Gregoire |
| EB & E | Ely, Boynton & Ely |
| E B E Co | Ely, Boynton & Ely |
| EBH | Baxmann |
| EFA SERIES | Excelsior Fine Art Publishing Co |
| EG | E Gregoire |
| EH edit., St Brienc | E Hamonic |
| EL Phot | E Lacour |
| ELD Paris | Le Deley |
| EN Edit | Emile Nourry |
| EP | Pandevant |
EPG  | Gerlach |
EPJ | unsolved |
| ER Paris | E Rabus |
| ERIKA | Paul Suess AG |
ESD  in or without shield with or without lion | Edgar Schmidt |
| ESW | Storch |
| ETWD | Dennis |
| EV à B | Emile Veeck |
Farles  | Unsolved |
| FB above G or Gl | Bauermeister |
| FF & Co | Frankel & Co |
| FM in the stamp box. | French military authorities distributed stamped envelopes and correspondence cards free of charge to the forces. one here |
| FMK | Manger |
| Fotocromo | Bassani |
| FR with or without Cannes | Robaudy |
| F & S | unsolved |
| FS & C | Frans Svanström |
| FT editeur | unsolved |
| FT Series | Fergusson |
| Imp FWH & Co | Hasselblad |
| FW above J in shield | Juxberg |
| GB & Co London | Giesen Brothers |
G D & D L monogram in 6-pointed star | Gottschalk, Dreyfuss & Davis Company Limited |
| GF | Germain |
| GF in an open oval | Christie |
| GH [on Norwegian cards] | Gunder Hagen |
| GH [on Belgian cards] | Hermans |
| GH ED | Hermans |
| GH W | Hastings |
| GKA | Granbergs |
| GL Co monogram | Liersch |
| GLM | Lips |
| GM | George Marchand |
[H]  | J Hassall |
| HB | Hoursch |
| HBW | initials attributed to Lance Thackeray by Tucks |
| Ed Helio BF ALGER | Berthaud Brothers |
| HG & Co Z | H. Guggenheim |
| HHB | unsolved |
| HLM | Le Maillot |
| HM monogram | Hauser & Menet |
| HM & Co | Henry Moss & Co |
| HM Uccle | Leontine Dobrecourt |
HN a A  | Nacken |
horse logo | Heinrich Ross 2494 |
| HSM monogram on the address side above Winternachte 4 Dess | Sonntag |
| H St W XVII | H St of Vienna 17 unsolved |
H v d M logo in shield. | van der Moolen |
H y M -M  | Hauser & Menet |
Brown logo of globe with eagle landing on it, and sash with IAPCOLTD on it and handful of reeds. | International Art Publishing Co |
| Collection Ideale, PS | Satragno |
ID 1827 M | Daziaro |
| ILLUSTRATO LUZERN | Bachmann |
 | Duval |
| JA & Co | Alderton |
| Eneret JF | Fredrikson |
| JFAB M10 | Amonn |
| JJ | Jullien |
| JK | Kalb |
| JNA | Joseph Nuss |
| JPN | unsolved |
| JRRE | John Russell |
| JPW | Popper |
| JW & S | Welch |
| K & B D | Koch & Bitriol |
| KHB | Hugel |
KF in palette with brushes surmounted by Paris with EDITEURS & ARTS  below | Kunzli Freres Paris |
 KN logo | Knackstedt & Naether |
| “Knox” Series | William J Hay |
Kopal  | Koch & Palm |
| KSPM | unsolved |
| LG THE “PREMIER” SERIES | William Lyon |
| L’H Paris | L’Hoste |
| L & H Cairo | Lichtenstern & Hariri |
three leaf clover logo with the letters L, K and F in the leaves | Ludwig Klement |
| L J & Cie edit., Angouleme-Paris L-J & Cie Angoulême | Laroche-Joubert |
| LL | Leon & Levy |
| LLB | Leon & Levy |
| LML | unsolved |
| LP | unsolved |
LS above B in a shield | Saalfeld |
| ENERET M & Co | Mittet & Co |
| M-B above M in shield | unsolved |
| MCW | Whishaw |
| ME & Co | Ettlinger |
| MF Paris | Maison Fleurmont |
| M & Co., Ltd | unsolved |
| M & L G | Millar & Lang |
MM over L | Mehner & Maas |
| MM Triest | Milan Mandich |
| MM Vienne | Markus Munk |
| MNCo in painter’s palette | Metropolitan News Company |
MP Madrid  | MP Madrid |
| M S i B | Schlesinger |
 MSJ | Mader & Springer |
MTB | M T Bassani |
MTIL logo with each letter in a different leaf of a four-leaf clover | Tesson |
| MT above IL | Tesson |
MV inside C  | unsolved |
National Series | Millar & Lang |
| ND phot | Neurdein |
| NED | unsolved |
 NJB monogram in artist’s palette GEDEPONEERD FABRIEKSMERK | Boon |
| NK | Normann |
| N & O | Nenke & Ostermaier |
NPG | Neue Photographische Gesellschaft |
NRM  | Nederlandsche Rotogravure Maatschappij |
| Serie OB | Bartholome |
OPF  | Osnabrück Paper Factory |
| OVS Bruxelles | van Stalle |
 OZ above M in a shield held by a male figure in a cassock decorated with a cross | Zieher |
| PA logo with flower | Peter Alstrup |
PB  | unsolved |
| P & C Athenes | Pallis & Kotzias |
 PCK | Koeber |
| PD | Paul Dupré |
| PFB | Finkenrath |
| P & F either side of a winged cross with B below it | Finkenrath |
PF in arrow or PFC  | unsolved |
PH in triangle with curved sides  | Photochemie |
Ph M  | unknown |
| PLM edit Cannes | Maillan |
| PM & Co with or without London or L | Pascalis, Moss |
PMM  | Unsolved |
| PP above A | Pittier |
PP above C | see L’Hoste |
PPP  artist’s initials | unsolved |
| “PREMIER” PICTURE POST CARD Premier Series | William Lyon |
| Collection Ideale, PS | Satragno |
| PS a D | Paul Suess AG |
| PS & Co, Box 1205, Cape Town | Paul Schaefer |
| PS & V Lewisham | Perkins |
| PVB | Bradshaw |
PVK above Z on its own or in a shield | Kunzli Zurich |
| PZ | Photoglob |
red cross surmounted by curtains and a crown  | Golike and Wilburg |
| Reliable Series | Wm Ritchie |
| H.G. & Co. Z | Guggenheim |
| R & JD | Rommler & Jonas |
| R & K | Regel & Krug |
RL above H in a shield | R Lederbogen, Halberstadt |
R & L in much larger M in a circle | Reiner & Lippacher |
R M anchor logo | Mosinger |
RN Vienna  | Neuber |
RPH monogram on its own or in a circle  | Rotophot |
| RPI | Société de Reproduction Photographique Industrielle |
RR logo in a castle with two turrets | Reinicke & Rubin |
S  | unsolved |
| SB Ltd., 12 Chapel Street, London, E C | Solomon Brothers |
SPA  | Salon de Paris Association |
SRS  | unsolved |
STAB GALILEO MILANO | Galileo |
| St & C | Stenders |
St & Co a D  | Stengel |
SBW in clover leaf | Bluh |
SEcD  | Sallo Epstein |
| SIP | Societe Industrielle de Photographie |
SOUVERAIN  | Winkler & Schorn |
solid five point star in the corner of the photograph and on the address side beside a series number | Piprot |
S&T CT in a logo of overlapping triangles | Schaefer & Traill |
T in scalloped logo  | Trenkler |
TEL | Eismann |
TG Madrid | Tomas Gianello, Madrid |
Thistle logo  | unsolved |
 logo of T with elaborate P intertwined | Paul Trabert |
Tower logo | unsolved |
| Editions “Trianon” | Paul Suess AG |
| TSN | Stroefer |
tulip logo | Nuss van Brutzel |
 | Ullman |
| USSPCCo | United States Souvenir Post Card Co |
V  | unsolved |
| VED hand-written in bottom corner of monochrome photograph | Ernult-Doncq |
| Ed VG Bruxelles | V Gregoire |
| V & JC Gibraltar | Cumbo |
| VP with or without Paris | Porcher |
| V & S SERIES | Valentines |
| Vve Ed M | Mme Marchand |
VW monogram logo of intertwined initials in circle above a four-digit number  | Wiechmann |
| WAB monogram Registered Trade Mark inside a circle | Atlee Burpee |
| WH monogram in shield | Hagelberg |
WHS | W H Smith & Son |
| WJHE | William J Hay |
W & K  | Wildt & Kray |
| Woodbury Series | Eyre & Spottiswoode |
XX  | unsolved |
Undivided-back Postcards 