I have a case for the ID - on the photo comparison to standard MESKO made 7x57r and x7x65r.
rim - 13,5 mm [7x57r/7x65r - 13,2mm]
rim height - 1,53 mm [ --//-- - 1,2 - 1,3 mm]
length - 55,65 mm [probably cut]
Upper and middle diameter smaller than the above-mentioned cases.
Looks like a unfinished case from tests, before turning the rim / groove.