Curiously, it's not the Polish bomb fuze 40/60 FA wz.35 for Fragmentation bomb 12 kg FA wz. 35 - although it was identified as such in a past post (i have the same couple of photos in my computer, also with the mention " Bomb Fuzes (48/60 model 35)".
It's apparently the fuze for the Polish 10kg smoke bomb G wz.34. The small diameter vanes are laking. It's interesting as this bomb, constructed in 1934-1936, wa was put into service in 1937 but was not produced in large numbers.
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