Replacement Balancer Part #

This balancer is from a house built in 1989, Andersen 200 series narroline window. Visible glass measurement on the lower sash is 27 15/16" high, 36 7/16" wide. Per Andersen's window sizing chart, the replacement balancers should be 16L - Part #: 1626082 and 16R - Part #: 1626084 but I would like to confirm, as I cannot find or correlate the numbers on the existing balancers to any current part #. It is difficult to see in the picture (and in person), but the number beneath the A|W stamp in this photo is: BN4 1331 8-88. On the opposite balancer, P90 1331 2-88. Both balancers also have the number 11600 on the opposite side (barely visible - cannot capture a photo). Any help you can provide would be greatly appreciated!