Thanks. Very good info, but none seem to show the M4 tube on what my documentation describes as a naval mount. Appreciate your assistance.
PT334 was experimentally fitted with a 75mm M4 aircraft cannon on an M2A3 gun mount. I have the manual for the weapon, but cannot find an image of the mount? Anyone familiar with this mount? I suspect is was a simple, low angle manually-driven mount, as it was lighter than the standard MK3 40mm mount fitted to PTs. I'd like to do a drawing of her in this configuration.