Re: 837 alternator
 

Spotted the 4 and then saw Steve's post. Looks like an 834 someone tried to make more pricey!

Re: 837 alternator
 

Have to admit the forgers are getting better.

Re: 837 alternator
 

That is why, collectively, we usually can come up with the good date codes. [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

Re: 837 alternator
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: L78steve</div><div class="ubbcode-body">Have to admit the forgers are getting better. </div></div>

I agree with that. Very well done.

Re: 837 alternator
 

Thought I posted this question earlier...

When a date is 'massaged'...isn't the surface of the housing altered?

I would think it would have to be ground down or milled to create a clean surface for the re-stamp...

just trying to understand the process.

wilma [img]<<GRAEMLIN_URL>>/hmmm.gif[/img]

Re: 837 alternator
 

I think they sandblast the area until the unwanted stamp disappears. Then re-stamp.

Re: 837 alternator
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: WILMASBOYL78</div><div class="ubbcode-body">Thought I posted this question earlier...

When a date is 'massaged'...isn't the surface of the housing altered?

I would think it would have to be ground down or milled to create a clean surface for the re-stamp...

just trying to understand the process.

wilma [img]<<GRAEMLIN_URL>>/hmmm.gif[/img] </div></div>

I agree.
I looked as best I could for signs of the surface being &quot;massaged&quot;, but it looks pretty even around the 37.

Re: 837 alternator
 

The &quot;7&quot; always seems to tell the tale, if you look at the 37A, the 7 has a little &quot;swale&quot; to it (pushed out stamping)that is how most of the &quot;7's&quot; in the 837 p/n sequence look as well. The &quot;7&quot; in the p/n is crisp, too crisp

Re: 837 alternator
 

Good eyes guys! probably a good policy (when buying an 837) to look for an original (not sand blasted) skin. Mike's photos show the surface to look for. Similar to block stamps that have been &quot;aged&quot; with acid - don't just pay attention to the numbers, look for the surface that they are stamped onto.

Re: 837 alternator
 

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: William</div><div class="ubbcode-body">The entire 1100837 37A stamp matches what I have.

If you were going to re-stamp one would you pick a date that 'wasn't known'? </div></div>

Well, he might not, but some of the guys restamping this stuff aren't always that smart.

Just as an example, below is one of the worst DZ block restamps of all time, especially considering 1969 was NOT leap year.