I love the Bund 1550, and plan on adding one to the collection at some point.

The most extensive overview of the variants in them I have come across is here: http://brown-snout.com/horology/articles/heuer_bundeswehr_chrono/

Everything on yours looks good to me on the face of it, with everything looking to be as it could have left the factory, but that's just based on my limited knowledge. Lovely watch anyway.