Banana Flipper Rubber left side

NOS curved Banana flipper rubber (left side) used on Time Warp and Disco Fever. These are New Old Stock and have been in a plastic bag since the 70s.

• Original part number was 23-6537-L, then came 23A-6537-L, and finally 23B-6537-L. I suspect the letters refer to minor revisions...
• Williams logo (unlike remakes)
• Rubber elasticity and texture is in great condition!
• Due to age, there is discolouration, with a more Dijon yellow hue to some parts of the rubber in addition the the brighter style yellow.