Julian Date Codes vs Cowl Tag Build Dates

[enio45]

In order to determine the days of the week a 69 camaro would be built - we would go to the cowl tag to get the code - so for example 04C.

The April calendar week starts on a monday - so effectively that week could be considered 03E if we look at build dates - OR would it be considered 04A?

Im trying to determine the days of the week a car would be built if it was an 04C cowl date code.

Thoughts and help?

[PapaSmurf]

Eddie
I had the similar issue with my car. It has a 08E on the cowl tag but has a build date of September 3, 1969 according to the NCRS documents. Based on that information I assumed that the weeks would have to start on Friday, Saturday or Sunday to have a September 3 build date with a 08E cowl tag. Right or wrong I then assumed that Sunday was the first day of the week.
Using this layman logic I would assume that a 04C cowl date code would have been built during the week of April 20th to 26th.

[mockingbird812]

Eddie,

The 1st day of April '69 was a TUESDAY. A car built any day that week, except Monday, would be an 04A car as far as the trim tag is concerned. If that car was built on Monday of the same week, it would have been an 03E (Monday the 31st of March would have been the 5th week of March). Also, it is my understanding that the trim tag date is the date that the car <span style="font-style: italic">began</span> assembly. It may have been completed the same day, but it could have been completed at a later date.

IMO, an 04C car would have had a start build date of 14-18 April.

Ervin,

I belive this is why NCRS shows your car as being completed on 3 Sep vs &quot;08E&quot;. August had 5 different weeks that a car could have been built in. Yours was <span style="font-style: italic">started</span> some where from 25-29 August but, was not <span style="font-style: italic">completed</span> until 3 Sep.

[Verne_Frantz]

From my research, each week, A, B, C ect denotes the &quot;calendar&quot; week, not the first 6 days and the second 6 days, etc. IF you look at the calendar for the week in question and there is only one day (other than a Sunday) on the top line, then that &quot;A&quot; build week has only ONE day.

Verne [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

[L72copocamaro]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mockingbird812</div><div class="ubbcode-body">

The 1st day of April '69 was a TUESDAY. A car built any day that week, except Monday, would be an 04A car as far as the trim tag is concerned. If that car was built on Monday of the same week, it would have been an 03E (Monday the 31st of March would have been the 5th week of March). Also, it is my understanding that the trim tag date is the date that the car <span style="font-style: italic">began</span> assembly. It may have been completed the same day, but it could have been completed at a later date.

IMO, an 04C car would have had a start build date of 14-18 April.

</div></div>

I have always been curious about this, and it's great to see some discussion of it. But if this logic is correct my 06B should be 06C. Per the NCRS report, my June 13th build date would have been in the 3rd week of the month.

[Kurt S]

Fisher didn't have hard, set rules on the weeks. It was for their purposes, Chevrolet never looked at it.
NOR was not consistent. You can try to force a calendar on it - square peg, round hole.

Go off the production date from the NCRS shipping data.

[Keith Seymore]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: enio45</div><div class="ubbcode-body">In order to determine the days of the week a 69 camaro would be built - we would go to the cowl tag to get the code - so for example 04C.

The April calendar week starts on a monday - so effectively that week could be considered 03E if we look at build dates - OR would it be considered 04A?

Im trying to determine the days of the week a car would be built if it was an 04C cowl date code.

Thoughts and help?

</div></div>

I don't think we can shoot that straight.

The Fisher codes are specific to body build only, and even then there is a margin of error, due to work stoppages, breakage, or general assembly down time.

Also - keep in mind it takes a few shifts for the body to get started and get through the body shop, and then through paint. Once it drops down into general assembly it can be completed within a few hours (likely that same shift). It can then still spend a few hours to a few days running around in the repair area before actually leaving the facility.

Really no way to know for sure unless you happen to be standing there as it goes by, or if you drive it off the end of the line yourself.

K

[70 copo]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Kurt S</div><div class="ubbcode-body">

Go off the production date from the NCRS shipping data.
</div></div>

Unless the car sat in AGR or in the repair lot for some period of time after primary assembly was finished.

[enio45]

OK having said the above - when u have a an 04C car what dated YH wheels would be appropriate for the car. Related to YH, Late Jan wheels are known, Feb, only 2-21 or so wheels, no march wheels that i know of, and april - we have 4-18, 19, 20 I'm not sure of and 4-21 for sure

with the closeness of the date of the wheels and the 04C - getting the right wheel dates is key to the build date.

so what do we use for an 04C? The key to me is the actual build dates of the car.....

Ed my own car is a 04C build date. I have it written down it would have been the week of April 21-27. I know I did the research on this at least 10 years ago but do not remember how I arrived at that conclusion.