The gunners vision device..ie periscope is a Minneapolis Honeywell on the Ram l and is replaced with a ventilator on the Mark ll.........
The sighting telescope is a No. 33 on the Mark l and a No.22 C mark ll on the Ram Mark ll......
The maker of the gun sighting telescope is not given,but is in the same paragraph as the periscope so may also be M-H also,but not certain..