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Convertible top, how do you tell the year

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Old 09-09-2017, 11:54 PM   #1
Duntov
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Default Convertible top, how do you tell the year

Looking through some of the parts we have, I found a convertible top, and likely a frame. How do you tell the year the top is off of? I haven't worked my way over to it to uncover it, but know it's white.
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Old 09-10-2017, 02:19 AM   #2
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The date code should be stamped on the back window.
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Old 09-10-2017, 08:23 AM   #3
Alan 71
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Hi D,
While not a 'date', if it's an original top there might also be some characteristics about just how it was made and stitched that could give a hint as to what 'era' it's from.

For instance how the front roll and rear tack-strip are done can indicate the age of the top.
Also, just what the material to the rear of the side door window is can be a clue.

Regards,
Alan

69 Top




Last edited by Alan 71; 09-10-2017 at 08:28 AM.
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Old 09-10-2017, 04:18 PM   #4
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As you can see in this picture from Al Knoch Corvette Interiors there is a date stamp on the left rear bottom of the window:



Not sure how to decode it but it is there if it's original (it was on mine before I replaced it) and Al Knoch can stamp new tops with it if desired.
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Old 09-10-2017, 04:22 PM   #5
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Is there a way to tell on the frame?
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Old 09-10-2017, 07:50 PM   #6
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When I replaced my top I did recondition my frame by blasting it and a repaint but I didn't look for any serial number or date stamps because I'm just not into that kind of thing so I don't know. Alan may be able to answer that or you could look through a judging book. If there was a stamp on the frame a judging book should have that information.
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Old 09-10-2017, 09:54 PM   #7
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We inherited some parts and not sure what everything is. The parts are a lot of C2 and C3, but since we don't have any convertibles I have limited knowledge.
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Old 09-10-2017, 10:25 PM   #8
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Post up a picture of the frame and I should be able to tell if it's for a C2 or C3.
Round Rock, Tx. We lived there for 10 years and my oldest was born in RR Hospital. Lived in Cat Hollow off of O'Connor Drive.
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Old 09-11-2017, 09:11 AM   #9
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Please post the pictures as Andies suggests. The date code will tell you when it was manufactured, but not the model year of the top. A good service replacement may have a date code much newer than the car. I would fear a service replacement for a C2 could have a date after 1967.
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Old 09-11-2017, 09:45 AM   #10
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Quote:
Originally Posted by theandies View Post
As you can see in this picture from Al Knoch Corvette Interiors there is a date stamp on the left rear bottom of the window:



Not sure how to decode it but it is there if it's original (it was on mine before I replaced it) and Al Knoch can stamp new tops with it if desired.
Here is the area theandies mentions above blown up so you can see the logo and date code to help you determine. (This photo is taken from the Richard Prince 2nd ed. 68-82 Restoration Book). The 171 translates to Jan. 1971. As far as date codes on the frame, I don't think there were any on the frames. At least I couldn't find any mention of that mentioned in any of my C3 Judging Guides or reference materials. The frames are only judged for condition/ fit / hardware and correct satin black color.
If you post a picture I'm sure someone will be able to tell you more.
Hope this helps,
Tooch
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Last edited by Tooch1; 09-11-2017 at 09:50 AM. Reason: Added info.
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Old 09-11-2017, 11:02 AM   #11
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So what no one has come out and said, if it is a c-3 frame, it will fit 68 to 74 c-3. I think there was s alight difference with the cable over the window between 68 and later years, but don't take that to the bank.
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Old 09-11-2017, 05:25 PM   #12
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Quote:
Originally Posted by c69vete View Post
So what no one has come out and said, if it is a c-3 frame, it will fit 68 to 74 c-3. I think there was s alight difference with the cable over the window between 68 and later years, but don't take that to the bank.
I would think the frame would fit a '75 too.
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Old 09-11-2017, 08:17 PM   #13
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appreciate the info. The to is buried in a corner that doesn't have much access.
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Old 09-13-2017, 10:48 AM   #14
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To id between c2 and c3... to me the quickest way is to look at the header. The header bow on a C3 was huge... the c2 bow was way smaller. A 68-75 top would also have an abs plastic header panel cover.

C3 header panel cover.


C3 header


C2 Header


The 68 top tension cables were different, they were shorter by 2-3".
And lastly, the 73-75 tops had an extra stay cable for the rear bow on the driver side.

Willcox
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Old 09-13-2017, 08:20 PM   #15
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Quote:
Originally Posted by Willcox Corvette View Post
To id between c2 and c3... to me the quickest way is to look at the header. The header bow on a C3 was huge... the c2 bow was way smaller. A 68-75 top would also have an abs plastic header panel cover.

C3 header panel cover.


C3 header


C2 Header


The 68 top tension cables were different, they were shorter by 2-3".
And lastly, the 73-75 tops had an extra stay cable for the rear bow on the driver side.

Willcox
That's what I was going to look for if he posted a picture.
My '71 frame has the stay cable for the rear bow, drivers side.
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Old 09-13-2017, 09:46 PM   #16
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This is why it's going take a while, as that is as close I can get to it.

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Old 09-14-2017, 01:49 AM   #17
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I know there's a C3 under that pile.
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