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Discussion Starter · #1 ·
After subjecting my bike to a particularly nasty ride in the slush and salt I spent a day detailing. When I had the Deltas apart to clean and lubricate the pivots and linkage I noticed there were numbers in the cover casting.

"3/1" is clearly visible.

When I looked inside my wife's Deltas there's no markings.

What gives? My guess for my Deltas is that they were cast in March of 1991, but that's just a guess.
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