Bicycle Reflector Help

[cambria09]

Hello All. I found this at a 1920's home site. It's about 1.5-IN in diameter and the red part is plastic (I think). The base is made of Al (I think).

I have several of these in green, blue, and red some of which appear to have glass reflectors and brass bases.

I know this one probably went on a bicycle but I cannot find much specific info on the age or manufacturer of them. Any help is appreciated.

Thanks. C9

 

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[NOLA_Ken]

Is it glass or plastic? If it's not marked it'll be hard to say for sure how old it is, but a glass lens would put it in the older range.

 

[PaJim]

If its plastic...1950s, if its glass 1930s. I collect antique bikes, but not a real expert on the reflectors.

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[CaptEsteban]

Some like that were used for car license tag bolts.