: HI tim,

: you are correct, if the watch have it, it will be between the lugs.
: My early 3647N SN66xxx don't have the model number on the case.

: Thanks

: Jeff z

Thank you every one

Since so much talk about the price...
I have spent a ton of time and found examples over the last year+ at auction and on forums between $3500-$5100 for the 3647N. Then the big jump with the all original sale on eBay ($6400) referenced in this string, though the Pricing Guide references $5,800 for an exceptional dealer example.
This dealer example seems to have had some polish and the lume doesn't look to be original to me..though it does look nice!
This one is far more than I can pay (and I think the value), but thanks everyone for the help on quality of these shown-
Maybe their price will come down, right?? Riiiiiiiiiggggggght....