I found three of these from a business that closed down and still had some of their backstock from the 1940s-90s. So these are a few great examples from the 1950s. 1950s letterman sweater deadstock with tag!
*this one is for the size 40
Label: Exclusively for Father + Son Moose Jaw
Fabric: likely wool or wool blend
Measurements:
Pit to Pit: 19"+
Waist: 13" +
Length: 25"
Sleeve Length: 23.5" with unrolled cuffs
Shoulder to Shoulder: 16.5"
Condition:
they all have some uneven yellowing from storage - this one also has a few spots as shown - otherwise this one is in great shape - sold as found.