Found this while searching coin rolls this morning. Cuds on Coins have around 6 or 7 that are close to this one listed. I think a very close match is CU-1c-1982-38-(LD)(CU)
I don't see the typical weak area on the reverse side of the coin. I find that odd with that significant sized cud. I guess the "STA" is a little week, but I would expect more. Just saying.
If you can't find an exact match look for position and details of a smaller Cud. you may have a later progression or stage than what is listed.