5460346 Master Cylinder

[cook_dw]

Nope sorry.

[JohnZ]

The "D 1" is the pattern number at the Defiance (Ohio) GM foundry - that foundry logo is to the left of the "D".

[bc69]

John was there any connection to D 1,2,3,4 in time frames from Ohio? Just curious about the number. Most want to tie it to date codes in some way.

[JohnZ]

John was there any connection to D 1,2,3,4 in time frames from Ohio? Just curious about the number. Most want to tie it to date codes in some way.

Nope. It's not a date code - it's foundry pattern number identification.

[bc69]

Does this look correct?

[bc69]

Opinions on this stamp. Original?

[Mike S]

Hi Brad,
    Normally the pad where the code is stamped has a more flatter machined look from some of the ones I have seen in the field. But that is not to say your example hasn't had some surface oxidation to cause the rough texture. I have two WT's on my '67's I can look at but from memory the fonts on yours look legit.

Mike

[bc69]

Thanks mike if you can post or pm me pic it would be great.

[HawkX66]

Hi Brad,
    Normally the pad where the code is stamped has a more flatter machined look from some of the ones I have seen in the field. But that is not to say your example hasn't had some surface oxidation to cause the rough texture. I have two WT's on my '67's I can look at but from memory the fonts on yours look legit.

Mike

I've seen a lot with the machined look also, but my original 309 US looks exactly like his surface. My stamping is barely legible though.

[Stingr69]

Pad looks aged as if it was rusted.  No expert here, but that stamp looks to be a little too fresh and crisp on an otherwise OLD looking surface . JMO

[Mike S]

 Here are the two 'WT' master cylinders on my cars. Both are original to the car with the LOS unit being unrestored.
I looked all over and cannot find any Julian date besides the part number and foundry cast info.
The 05B NOR stamp has a light 'W' stamped compared to the LOS unit.

Mike

[bc69]

Mike I have seen both more than once. What's date on Los car.
I know of a early Los that has stamp like your nor .

[Mike S]

Hi Brad,

  The 04B LOS UOIT lists a date of April 13, 1967
For the 05B NOR car the NCRS document lists the date of May 12, 1967

Here is a close up of the NOR WT. The machining is not flat so the W isn't as crisp.


Thanks,
Mike

[bc69]

I was looking at stamps and looked over the one date code. Both cars are so close. But we all know there was a lot higher production numbers were higher in nor.
Well I'm still in the market for one for my 7. This all helps me with the hunt for orig.
There are a lot of faked ones out there.

[Mike S]

The NOR WT characters looks like the one you posted. Where is that from?

Mike