VW Beetle IRS Gearbox AM code 1300

AM code 1300 Beetle IRS Gearbox Absolutely no history known Has been in my shed for longer than I can remember Untested     I am not a fan of selling gearboxes as I haven’t had them apart and can’t see what is going on inside them. So unless I have driven them it is hard to gauge how good they are and so a strip and maybe rebuild is always recommended although they could be fine. Gearboxes are sold on this basis. Please talk to me and come take a look at them.