Military issue A17A crystal and seals

I recently bought a 1958 A17A, and I need to replace the crystal. Can someone tell me if the watch would have originally had a glass or an acrylic crystal? The crystal that is on it now is acrylic, but I had an older Waltham A17 and I was told that it would have had a glass crystal originally. I also need to replace the seals in the Bulova A17A, so I'm looking for those, in addition to a crystal.
Thanks,
TQ