Omega Speedmaster Reduced

Hi Omegafans!
I have a few O.S. Reduced watches and have the following questions;
From what I've read Speedmasters are not following other kind of Omegas when it comes to serialnumbers connected to appr. year of production. Does that include Reduced versions or is it meant just for Proffesionals?

The next question is; are there anyone out there who can help me to find the approximate year of production for the following watches:

Ref nr: 1750032
Cal. : 1140
Serial no: 53446288

Ref 3510.50
Cal. 3220
Serial no: 57575681

Ref: 1750083
Cal: 1152
Serienr: 56881333

Would be extremely glad if anyone could help me out

Best regards; Christer in Oslo

Thank you!
I understand it could be +/- a year or so but I'm also glad to have the confirmation that reduced Speedmasters belongs to Omega what so ever when it comes to fine out the year of production.

Tanks again and have a great weekend

Best regards Christer