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Join Date: Sep 2020
Location: Sacramento, CA
Posts: 399
Bikes: 2017 Sage Skyline, 2015 Co-Motion Periscope Tandem, 2012 Soma Smoothie, 2006 Kona Jake, 1986 Miyata Nine Twelve, 1977 Peugeot UO18c, 1977 Peugeot PRN10, 1974 Allegro Schweitzermeister Model 76, 1972 Hugo Rickert Spezial
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My 1974 Allegro Schweitzermeister for comparison
The lozenge serial number came later.
The fork design was like this in the 60s, too.