I just used a set of calipers to measure the thickness of the sleeves on a few of my jackets. I took multiple measurements across the length of the sleeve (folded it and divide measurement by 2).
TOJ MDR ca. 2013 (black lamb) approx. 1.27mm thick.
TOJ A2 ca. 2011 (brown lamb) approx. 1.50mm thick
Falcon Varsity ca. 2015 (black lamb) approx. 1.22mm thick
Falcon MA-1 ca. 2015 (black lamb) approx. 1.53mm thick