Bump for an old thread, sorry, found it researching a mag I just bought.
Marked
"OFT 1994"
"NAGAZINE 7.62MM 3A1"
"1005-005710"
On the opposite side either "10", or "IO".
Rough grey park finish seems welded together from a pair of 1/2 shells with the seam up the front & rear faces. Slightly curved body as the first images.