Appearing a year after his death, Frommer`s last design was an improved Model 1929 in 9mm Short chambering. It was adopted by the Hungarian army as the `37M.` The principal difference between the 1937 and 1929 patterns lies in the abandonment of pinned-in cocking grips at the rear of the slide in favor of conventional grooving. The later gun also has a smaller hammer and an additional finger-rest on the toe of the butt. A Frommer-type grip lever provided the only safety device. The grips are wood. The bottom of the magazines are marked `37M`. The slide is marked: FEMARU FEGYVER - ES GEPGYAR RT 37M. The leather holsters are stamped with "BORGYAR" (Leather Factory) on the back side.