Door hinge stamped numbers?

[torredcuda]

What do they mean? These are B body so the B is obvious but not sure about the numbers.I thought date codes but that doesn't make sense as my original is 0950 but the build date of the car is December '69?

[mtull]

I'm thinking 1099 would be the 109th day of 1969 (April 19, 1969).  Eight months prior to your cars build date?  The numbers stamped on the other hinge might be backwards or upside down. The first two numbers appear to be '11' but upside down?  The last number appears to be a '2'?  Perhaps the 112th date of 1972?

[torredcuda]

I should clarify the ones pictured did NOT come off my car, they are spares I have. The one that did had 0950 which would be the 95th day of `70 but that would not be possible with my cars build date in December `69.

[torredcuda]

Original hinge just removed from door, car was built 12/69.

[MoparLeo]

Over the years I have found that some have numbers and some don't.

[mtull]

Original hinge just removed from door, car was built 12/69

I believe the MMC Detroit E-Body books state the numbers translate to a four digit date but I'd have to look again.  With that said MMC tries to present information based on evidence.  Sometimes new evidence requires updates to their books.  Perhaps they later found the numbers could represent a date or something else?

Are you getting the cars build date of December 1969 from the build sheet? 

All I can offer is the four numbers stamped on the hinges for my car appear to be dates.  All numbers translate to a reasonable timeframe before my cars scheduled build date called out on the door sticker and fender tag as well as the date referenced on the build sheet.

[torredcuda]

A couple of the spares have no numbers. The build date is from the fender tag but I just cleaned paint off the door sticker and it also says 12-1969. I'm 99% sure the hinge I just unbolted from the door is original to the car so the 0950 stamp would not make sense as a date code. 

[mtull]

The build date is from the fender tag but I just cleaned paint off the door sticker and it also says 12-1969

I believe the fender tag and door sticker list the scheduled or estimated build dates.  Some cars were built early, some late.  I don't currently have enough knowledge to convey the likelihood of a car with a scheduled build date in December 1969 having parts assembled in April 1970.  With that said, I've read on this forum about cars being assembled two or more weeks after their scheduled build date.  Perhaps as you go through your car you'll see similar dated parts or maybe the door hinge is an outlier?

[torredcuda]

From what I have read the fender tag has the scheduled build date but which could vary but the door sticker is put on later and is more accurate. Here is a Pic of the passenger side hinge, if it was a date codes that one makes no sense ad the year code would be '74. The drivers side would be the beginning of April `70 which is way after the 12-1969 door sticker was put on.

[mtull]

if it was a date codes that one makes no sense ad the year code would be '74. The drivers side would be the beginning of April `70 which is way after the 12-1969 door sticker was put on

Just when I thought I knew something and then something like this comes up.  If you don't get an acceptable answer on this forum, the best suggestion I can offer is to contact MMC Detroit at info@mmcdetroit.com.  I've had good luck getting responses from them in the past.  When sending an email I usually reference the volume and version number as well as the section of their manual I need further clarification on. 

[torredcuda]

Ya, same here, I thought it would be a simple date code but that is obviously not it. I don`t have any MMC manuals and to be honest I really don`t care too much about date codes or most other "correct" markings on my car. I only asked to satisfy my curiosity but after posting in multiple forum and FB pages without getting a good answer I now NEED to know!     

[torredcuda]

I e-mailed MMC but have yet to hear back. Here are the full of set of numbers of my original hinges.

Drivers top 0950 & 0988
Passenger top 0924 & 0962
Drivers bottom 1049 & 1070
Passenger bottom 1049 & 0999


My spares are -

1099 1122 07885 1132 1099 1083 one lower hinge has no numbers on either part.

The only thing I can figure is they might be lot/batch numbers?

[pschlosser]

A couple of the spares have no numbers. The build date is from the fender tag but I just cleaned paint off the door sticker and it also says 12-1969. I'm 99% sure the hinge I just unbolted from the door is original to the car so the 0950 stamp would not make sense as a date code. 

my notes from the 1980s say these are simply batch numbers the supplier used for quality control.

[mtull]

my notes from the 1980s say these are simply batch numbers the supplier used for quality control.

A batch number seems like a logical possibility, especially if someone comes across a four digit number that can't be parsed to a valid date.  Anyone know if there was more than one vendor supplying the assembly lines with door hinges?  IF so, I wonder if the aforementioned four digits have different uses based on vendor or assembly line?

[torredcuda]

I also thought possibly vendor code but there are a number of different ones and I doubt thee were more than 2 or 3 vendors for something like that?