At $150, if it runs and you like it, then I'm happy for you and I think it's a fair buy. Seems an original piece - dial font, LXW on the movement, and the caseback all indicate this was sold on in the US. You can make a free request to Longines for an "Extract from the Archives" and at the very least, they'll be able to tell you when it was invoiced and to where.
On the whole, it's not a particularly sought after piece and it's not my cup of tea. Having said that, I am a fan of the applied markers on the dial and the patina/damage to the dial (depending on your school of thought) isn't beyond my levels of tolerance.