Lot of 8 Kant Twist clamps 4 matched sets 6"D, 4 1/2"D, 3" & 2"

Description

Lot of 8 (4 matched sets) Kant Twist clamps purchased new in the late 1980's, used in a shop environment for 12 years.
Have sat mostly unused for the past 20 years. All function very well, little to no slop/no excessive wear.
Clamps have handling marks, age spots/patina, and owners markings. Markings are not excessively deep or noticeable. See pictures ask questions
Starting bid is 1/2 of current new retail price, Buy it now is 2/3 of current new retail price
Included are
Qty   Item#       Size          Depth closed    Depth open
2      #421        6" D            5 1/4"                 4 5/8"
2      #415       4 1/2" D         3"                     2 3/4"
2      #410         3"                 2"                    1 1/4"
2      #405         2"              1 1/2"                 1 1/8"