AVU nose and tail bomb fuze, Russia

[microplastic]

cutaway model of a russian AVU bomb fuze. The fuze is mechanical activated and can be used as nose or/and tail fuze. This fuze is intended for aircrafts that do not have electrical starting device. The fuze is used with high-explosive (FAB), high-explosive fragmentation (OFAB), high-explosive incendiary and incendiary air-bombs. The fuze provides point detonating and inertia action, ignition SQ and two delay modes.

Edit: Last picture shows the AVU-ET fuze, that has the same functions but is electro-pyrotechnically armed.