Interesting self discovery today when I realized some other same machines have different stamped numbers under the tension dial. After looking into this it was determined that the LEGARE was made with two versions of the Tension Cams (the T shaped inner part shown on the left inside of the machine). See the info in the online manual
Also on INSTAGRAM
The style of the V cam dictates the stitch tension range on the machine. What that relation is to the stamped numbers is not noted anywhere I’ve seen.
Do you have more to add?