Is it a 105.003-66 in a particular serial range, produced in 1967?
Are there any case backs that are marked 145.003?

 

http://www.speedmaster101.com/145-003-what-is-the-story/

 

Thanks. That helps. Is that in a hidden part of your site?

 

Well a bit....it's linked from the 105.003 page.

It's burried in the blog.