1st Google hit come up with:
http://www.fratellowatches.com/speed...-guide-part-1/
However, if we only look at stainless steel watches, you could say there are a number of versions:
- 145.022-68 ‘Transitional‘
- 145.022-69
- 145.022-71
- 145.022-74
- 145.022-76
- 145.022-78
After that, the 145.022 becomes the 145.0022. The -XX indicates the production year of the caseback. Let there be no misunderstanding that this also indicates the production year of the entire watch. For example, the 145.022-69 was produced from 1969 to 1971. The fact that a caseback indicates 145.022-76 and -78 for example, does not mean that Omega did not produce any Speedmaster Professional 145.022 watches in 1977. Always refer to the serial or movement number (not to be confused with caliber number) that is engraved on the movement.
Not a categoric answer (even assuming the information is correct), but it would suggest that models would have been made in the year you're looking for.
Good choice for a birth year watch BTW.