R55001
They also are sold under Case part numbers 10374-15-30 and 2540-01024708640. Fits CASE 580K & L plus others.
Latch is brand new. It is US made, all steel with zinc finish. I have the striker bolt available if you need one.
If you are unsure of your part number, match up your latch to the photo and drawing to verify you are ordering the correct one.