The Seeburg Rear Door Lock # 405735 is used on model M100C.
It uses the same G-245 key as the two dome locks.

This lock can be used on the wooden lower back doors found on models M100A, M100B, M100BL, M100C, 100W, HF100G, HF100R, 110J, 100JL, V200 and VL200.
The lock length is the same on all of the models using the wooden lower back door but the key number varies according to model.