IBM MeAns Service Button with 13 stripe logo - a true ThirteenStriper  
As you can see it is a very unremarkable back with no signs of rust. This button looks to have been stored well, the primary damage is due to workmanship during construction.

As you can see it is a very unremarkable back with no signs of rust. This button looks to have been stored well, the primary damage is due to workmanship during construction.