Yet another mystery bike

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juvela

Cruisin' on my Bluebird
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dating note -

mentioned lug pattern and crown pattern earlier in this regard

one clue which brackets things to the 1972 year specifically is the Simplex ref. 1752/1753 dropouts

here is an image of the PX-10 for the 1973 model year followed by a closeup of its Simplex ref. 1752/1753 dropouts (the manufacturer had gone back to the scrolly NERVEX Professional lug pattern for one year in 1973) -

1314152


1314153


note the "blister" or small bulge which can be seen at the rear of the dropout in line with the axle slot.

this was added between the 1972 and 1973 model years. its presence is in preparation for the threaded dropout adjuster screw which came subsequently.

note that it is absent on our subject frame.

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