Orient 21j World Timer Automatic
This is an none serviced watch being offered for sale.
This movement was made in at least two completely different variants with the same caliber number.
The version described here is a twin (except the size) of the Seiko 4206 with quarter-sector rotor, excenter changer as selfwinding mechanism and the lack of a manual winding capability. Another interesting fact is, that the date is corrected with the crown, but the seldom wrong weekday can very easily be corrected by a button at “2”.
The probably more recent version of the 46943, which is decribed in the german Chronos 1/1997 watch magazine, reminds pretty much of the Citizen/Miyota 8203.