Re: P-T-B
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in the jerry macneish Z/28 fact book there is a really good picture of an original firewall with the PTB stamps on it. if you look close you can see the overspray on the "b" as if
it was stamped on before the body was painted the color.
the picture is on the top of page 184. hope this helps!
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Z28's (and Z10, Z11's) may have overspray on the PTB stamps becasue the front stripes were painted by GM in their paint line, not Fisher. If the plant (most noticably Norwood) got the stripe color overspray onto the firewall, then they would need to touch up the offending areas. LA seemed to have a much better masking system then Norwood and hardly ever got overspray onto the firewall. although they also did not use the P T B stamps. Orange PTB stamps indicate the car was inspected during day shift, Green PTB indicates night shift. People with two different colors just reapplied them wrong. Norwood was pumping out 52 to 55 cars an hour, I doubt there is a situation where one car had one or two inspections on day shift and the remaining ones on night shift.
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