I never knew these existed so i can not vouch one way or another. The cost to chrome these would put these in the price range of real ones. If your car is a modified you could always polish these for the shine. If you do get these, let us know how it worked out.
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1957 Pontiac Pathfinder Deluxe sedan restored 261 six
1974 Chevrolet Caprice Estate wagon low mileage original 400 V-8
I'd suggest that as a restoration piece it would be better to custoim fit these on the bumpers to account for production variance and overall differences created in bumpers over the past 60 years.
'64 Parisienne CS "barn find" - last on the road in '86 ... Owner Protection Plan booklet, original paint, original near-mint aqua interior, original aqua GM floor mats, original 283, factory posi, and original rust.