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Saw these on the Bay, The manufacturer is listed as Welly 1/43. Usually with Welly scale is up for grabs but there's a photo comparison with a Road Champs Hurst Olds. The seller lists 4 different colors. 
Yes, Welly items can be off scale but this 1953 Chevrolet convertible was spot on. I bought few for "projects". One became a two door Bel Air sedan and on the work bench currently is a conversion to a 210 four door sedan using the roof from a 1954 Pontiac Chieftain four door by White Box.
Here is a comparison of the Welly and the 1954 Bel Air by Brooklin showing scale accuracy.
And the completed two door sedan and others.
John F. Quilter
Eugene, Oregon USA
I am not sure I really care for the '68 Olds model. I've not seen one in person, so I won't judge. The shape of the body looks good, although from your photos, the tires and/or wheels are too big. It would be interesting so see it with a different set.
John Merritt
South Lyon, Michigan - USA
I am not sure I really care for the '68 Olds model. I've not seen one in person, so I won't judge. The shape of the body looks good, although from your photos, the tires and/or wheels are too big. It would be interesting so see it with a different set.
Agreed.
John F. Quilter
Eugene, Oregon USA
I'm glad you posted that Chevy comparison, I wanted to buy one but hesitated because I was unsure of the scale.
They also manufactured a Pontiac GTO and a 1953 Ford but I can't find any pictures to measure comparisons with 1/43 cars
If these get down to Road Champs prices I would buy them. What they're asking, plus shipping is way too much.
John Q., your conversions are really neat. Well done sir.
I'm glad you posted that Chevy comparison, I wanted to buy one but hesitated because I was unsure of the scale.
They also manufactured a Pontiac GTO and a 1953 Ford but I can't find any pictures to measure comparisons with 1/43 cars
I believe I have seen the '53 Ford and it is a bit oversized. If buying from Ebay what I do is ask the seller to measure the overall length of the model then using Google, research the length of the 1:1 car and see how it comes out when doing the calculations for scale. This has been useful also for the Danbury Mint pewter models.
John F. Quilter
Eugene, Oregon USA