Viking Windows fromm late 1980s or early 1990 (home built in 1990/1991). Two different size windows - 29 and 23 inch channel length. Each stamp is shown in labeled images. The width of the top fitting is about 1.09 inches (caliper read), so 1 and 3/32 inches.
I need 4 of the 29 inch and 2 of the 23 inch ones.