Here's a 1K that passed thru my collection:



As you can see, the cracks are somewhat different. My guess for yours, seeing it in person - VAM-3T:
http://www.vamworld.com/1921-P+VAM-3T



As you can see, the cracks are somewhat different. My guess for yours, seeing it in person - VAM-3T:
http://www.vamworld.com/1921-P+VAM-3T































