Fabulous Antique Photograph of Extensive Doll Collection letter holder I can't find a signature

I can't find a signature or mark

(Someone else had purchased the others

The lid is threaded and screws off easily

which interlock to allow for even spacing between letters

) Very good overall condition

Fabulous Antique Photograph of Extensive Doll Collection letter holder I can't find a signatureAn incredible amount of detail and number of dolls! packed into this antique photo of someone's wonderful collection. My detail photos, shot at 2 or 3 times magnification show that there are photographs of dolls, as well as a curious photo of a masked couple, packed in here as well. I just wish we could see further into the other side of the cabinet! 4 7 8" x 3" and in very good condition. Early 20th c I would guess.