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#1
11-24-2015, 06:50 AM
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Re: 837 alternator
Thanks guys for your opinions.
I think I see what you're saying about the "4" remnants.
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Rick 69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.) 69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan  Don't text and drive. Somebody's life may depend on it! 
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#2
11-24-2015, 08:52 AM
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Re: 837 alternator
Spotted the 4 and then saw Steve's post. Looks like an 834 someone tried to make more pricey!
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Tim in NSW, Australia 1969 Van Nuys 04A Z/28 from Clippinger Chevrolet. Cortez Silver with dark blue interior. Ran at Lions Dragstrip and Pomona Raceway, with paint by Bob Kovacs of Fresno.
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#3
11-24-2015, 12:25 PM
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Re: 837 alternator
Have to admit the forgers are getting better.
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"Knowledge is good" Emil Fabor 67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold) 70 L/78 Nova M-21,Black Cherry,Sandalwood Int. 09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red.
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#5
11-24-2015, 06:03 PM
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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.
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Learning more and more about less and less...
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#6
11-24-2015, 10:31 PM
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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]
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02 Berger 380hp #95 Lots of L78 Novas Join National Nostalgic Nova! 70 Orange Cooler 69 Camaro
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#7
11-24-2015, 10:48 PM
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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 "massaged", but it looks pretty even around the 37.
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Rick 69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.) 69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan Don't text and drive. Somebody's life may depend on it!
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#8
11-24-2015, 10:47 PM
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Re: 837 alternator
I think they sandblast the area until the unwanted stamp disappears. Then re-stamp.
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"Knowledge is good" Emil Fabor 67 L/78 Camaro SS/RS H-H,1W,2LGSR,3SL,4K,5BY. (Sold) 70 L/78 Nova M-21,Black Cherry,Sandalwood Int. 09 Pontiac G8 GT Premium,Sport,Roof. Liquid Red.
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#9
11-25-2015, 12:19 AM
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Re: 837 alternator
The "7" always seems to tell the tale, if you look at the 37A, the 7 has a little "swale" to it (pushed out stamping)that is how most of the "7's" in the 837 p/n sequence look as well. The "7" in the p/n is crisp, too crisp
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70 L78 Nova Fathom Blue,Bench, 4spd, F41, 3:55 71 Porsche 911 Targa
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#10
11-25-2015, 10:22 AM
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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 "aged" with acid - don't just pay attention to the numbers, look for the surface that they are stamped onto.
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