70 - 72 caliber ID
February 24th, 2016, 03:32 PM
#1
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Join Date: Jan 2010
Location: hatfield PA
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70 - 72 caliber ID
How do you ID and date code 70 to 72 calipers see attached picture. I have a few of these that I'm cleaning up and want to know what years therefore. Way too many numbers on this thing. thank you Brandon
image_zpsdkitncho.jpeg
image_zpsdkitncho.jpeg
February 25th, 2016, 03:08 PM
#2
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Location: West Michigan
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I can virtually guarantee that the "L173" is a date code. Any time you see numbers held in the mold with screws like that, it means they are something which has to change frequently, like a date code.
As for how to interpret L173, I don't know. On most cast iron parts there's just one to three digits, designating days 1 through 365 for the year, and you're left to guessing what the year was. But I've never studied caliper date codes before.
As for how to interpret L173, I don't know. On most cast iron parts there's just one to three digits, designating days 1 through 365 for the year, and you're left to guessing what the year was. But I've never studied caliper date codes before.
February 28th, 2016, 06:23 PM
#4
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Location: New Westminster B.C.
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There is a seven digit part number that will be on the outside of the caliper.
On the backside of the caliper photo I have posted it shows just the last 3 digits. The large "L" stands for left. The Julian date is just numbers, for day of year, yours having an L that precedes the number I think may be an later year caliper. The dots in a circle are a time stamp, and the "CFD" stands for Central Foundry Division. The 636 is the last 3 digits of the part number repeated on the backside. A confirmed part number for Oldsmobile "A" body is: 5463 636 and 5463 637 left and right respectively. I believe 5470 675 and 5470 676 is correct for Olds "A" body's also, but have not confirmed this.
On the backside of the caliper photo I have posted it shows just the last 3 digits. The large "L" stands for left. The Julian date is just numbers, for day of year, yours having an L that precedes the number I think may be an later year caliper. The dots in a circle are a time stamp, and the "CFD" stands for Central Foundry Division. The 636 is the last 3 digits of the part number repeated on the backside. A confirmed part number for Oldsmobile "A" body is: 5463 636 and 5463 637 left and right respectively. I believe 5470 675 and 5470 676 is correct for Olds "A" body's also, but have not confirmed this.
