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Hello Thomas,
thank you for the good job with the pictures.
cycle produced by Chiorda right near to 1970.
the tower with C symbol seen in centre of seat tube transfer is one of their marks.
features such as bulge-formed head, plate style bridges, five-piece solid axle steel hubs, zinc plated headset and absence of chrome mark this as the very lowest model.
frame -
constructed with Agrati lugset of pattern "AM" ART. 000.8040/U.
bulge-formed head is item nr. 000.8046.
seat lug is item nr. 022.8049.
bottom bracket shell item nr. 000.8507.
dropouts are item nr. 000.8002
fork ends are item nr. 000.8010.
fittings -
chainset is OMG. arms and bottom bracket cups unmarked. centre section of spindle may be marked either OMG in an oval recess or with a simple letter C. zinc plated wedgebolts are Agrati nr. 000.2061. also offered in chrome at greater cost.
zinc plated headset is Agrati nr. 000.3071. also offered in chrome at greater cost.
36 hole five-piece steel solid axle hubs are Agrati Sport nr. 000.9011.
stem & bar set is 3TTT Touriste.
cycle's serrated 36 hole wheel rims are likely Maccari.
machine's Juy model 637 Prestige rear gear mech launched in late 1970 or early 1971 so is a helpful dating aid. the backside of its inner cage plate is likely to be marked with a date:
forum has had two other Chiorda threads you may wish to view:
https://thecabe.com/forum/threads/1970s-juventus-road-bike.106157/
https://thecabe.com/forum/threads/chiorda-road-bike-made-in-italy.106112/
Chiorda sponsored a pro racing team at one time. one of their stars was Felice Gimondi. they were purchased by Bianchi in 1966 and their facility was employed to produce many of the lower model Bianchi cycles of the late 1960's and early 1970's. most of the company's production capacity went into private labelling/contract builds rather than being sold under their own name.
bicycles were done for other U.S. based chain stores as well: Sears, Montgomery Ward, Kmart. the bright yellow Kmart AllPro bicycles of the early 1970's were done by the company. BTW - Penney's launched a discount house chain which operated for a brief period in about the late '70's - early '80's. it was called The Treasury - they probably had some house brand bicycles but do not know the name/manufacturer.
hope this has assisted a bit.
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