Help with plexi for 5513

[LugholeChris]

Hey all

Recently had the good fortune of acquirring my dream watch a 1966 meters first 5513. Would love to share photos, but not allowed yet on account of my low post count.

In either case, I love the watch dearly, but it has gotten a service crystal at some point, and would like to restore it to original spec.

I have read the many threads here about the NOS crystals being fragile and very hard to find.

What is the best option? Can see some have had good luck using a T-39 instead. What would the downside to that be?


Thanks for your time.