Hi all,
Has been a lot of fun following the conversation on the small biplane and to see that after reductios and deductions the right answer came up. It is French, a single-seater and several different engines were used and the LD-261 (SincoTC) was a slightly larger development.
LD-45 (LM) stands for Louis Desalle 1945 (designer initials and year) and type was developed for a company named MDG (Société Matérial Denis-Gruson)
3 examples were built. No.1 with 40hp Train 4T and then 40hp Mathis G-2F, no.2 with Mathis and no.3 with 75hp Praga. No.1 and 2 had mixed wood/fabric construction, no.3 was metal. The LD-26 was a larger 2-seat variant with wooden wing, metal fuselage and received a 60hp Praga D engine. It was later brought up to LD-261 with 65hp Continental A65. In addition 3 examples were built as LD-261, so pop was 3 x LD-45, 1 x LD-267 and 3x LDF-261.
I think LM came up with LD-45, so may I invite you , Sir (and thank you for posting!)