Nice find!
Can't go wrong with a Swingline. When I first started putting all my coins into cardboard/mylar "flips" I bought a cheap Chinese made stapler from Mao-Mart (oops! I meant WALMART). The thing was the biggest piece of garbage ever. About one out of every three staples would bend, not go through the cardboard, or jam up. I found an old metal Swingline at a thrift store for two bucks and that thing has yet to mess up a staple. It tears through the cardboard like a hot knife through butter. I threw the Chinese piece of crap into the trash where it belongs - but not before I removed the staples from it.