70’s Paramount Sticker removal

[Schwinn Sales West]

Off subject, but in the '70's a friend took his Penton Enduro M/C for a license at the Fullerton PD and they attempted to stamp a number into the Chrome molly frame. The frame was harder than the stamps and ruined every one of (the stamps) they tried.

Chromoly tubing is a stronger grade of steel tubing. This improved strength, allows objects to be built with thinner gauges of tubing and still retain the required strength. The net advantage is "lighter weight". Chromoly tubing is used in motorcycle, bicycle, and automobile racing frames because it will better withstand flexing without fatigue failure.

Chromoly is not hard like the steel used in a spring. I would doubt the chromoly metal damaged the number stamps, even if they bought them from Harbor Freight. The biggest problem in stamping numbers into a thin wall chromoly tube like used on a bicycle or motorcycle frame would be denting and crushing the thin tubular tubing causing damage.

This is likely why you see the serial numbers stamped into the flat metal fork ends. You could also place a mandrel inside the tube (like a bottom bracket tube) to absorb the hammer blows without damage.

California has used a small blue colored aluminum sticker for many years to place an "assigned vehicle identification number" on the frame.

John