68 1968 GM Pair of Vintage Black Seat Belts Seatbelts (4) Pieces

Description

A set of vintage GM seatbelts (4) parts.
I do not know which GM vehicle these originally came in.
I can only make out the label on one of them.
GM  Irvin Model - #2910
Manufacturing ID -
45 A 68
-- Made in Week
45
, Plant A
?, 19
68
Year
Thanks for looking and Good Luck, Pete