1970 Frame Marking

[Jack C.]

Is the number 10 within the circle consistent with an original frame marking? Thanks

[Terry M.]

Re: 1970 Frame Marking

Is the number 10 within the circle consistent with an original frame marking? Thanks

We3 see that mark on many early C3 frames. It is not unique to 1970. I wish I knew what it means.

[Jack C.]

Re: 1970 Frame Marking

We3 see that mark on many early C3 frames. It is not unique to 1970. I wish I knew what it means.

Thanks Terry!

[Eric E.]

[Ron G.]

Re: 1970 Frame Marking

I agree with the other replies that this is regularly seen.

[Mike E.]

Re: 1970 Frame Marking

If I remember correctly there is a similar mark on the frame “upper shock mount rail” that runs parallel over the rear axle housing on C1 too.

Eric,
I knew you were more than just a pretty face!

[Allen N.]

Re: 1970 Frame Marking

I have several of them on my frame, and I am pretty sure I have at least one 30 in a circle. I have no idea what they mean.

[Richard M.]

Re: 1970 Frame Marking

1959 Shock Crossmember.


1967 Gusset and Crossmember. (-10 and -40)

[Eric E.]

Re: 1970 Frame Marking

Eric,
I knew you were more than just a pretty face!

[Blair K.]

Re: 1970 Frame Marking

Numerous number -10 within a circle markings on my early '68 frame.

Page 11 - 12 of Joseph A Tripoli Jr's Corvette Chassis Restoration Guide (1st edition) shows the marking - although he indicated he was unclear what it meant.

[Tom R.]

Re: 1970 Frame Marking

Mike, It’s interesting the things that you remember and the easy things that you don't.

When I first saw the marks I wondered if the were a type of QC stamp to show that they passed measure checks. Always wondered if I would see a miss stamp or a double hit.

That's my guess...quality control! And for the metal stamp company rather than Corvette assembly plant.