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The center rear bolt hole was eleminated during the 1951 production year. After that time new replacements also came with no ole and there was no change in the part number.
So any 1950 today with no hole indacates the center secton has been replaced at one time.
We sols a lot of them as the metal was rather thin.
Gene Schneider
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An error in my above post.
The part nuber did change when the bolt hole was eleminated. From the 1950 parts book the original number was 3687961. On 7-1-51 it was changed to 3698600......may have entered assembly line production before that date.
You could always tell if sections of those 3 piece bumpers were replaced if they were bolted together rather than riveted.
Not sure about California and Canadian cars with one piece bumpers as far as the bolt hole is concerned.
Gene Schneider
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Thanks Gene. Any idea why there was a hole there in the first place?
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Pehaps at one time they thought they would offer an acessory bumper guard in the center like they did from 1938 to 1948.
Gene Schneider
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our 50 chevy convert that was built in calif, still has its original(albeit rechromed) bumpers, both one piece. the rear lacks the hole in the middle. mike mccagh
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I figured that the hole was there to help in the manufacturing process. It would center the bumper blank in the trim and forming dies. We often did that with large formed metal parts.
Apparently in the early 50’s the figured out how to use the other 2 holes for that locating function.
Rusty
VCCA #44680
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