PAT. PEND. diver's extension 9315

[Poohsan]

I have a diver’s extension that is the wrong age for my red sub. It is a shame to let it go to waste so I’m trying to figure out what to do with it. Should I build a bracelet around it or trade it for something I can use?

Can anyone help answer these questions?

- What was the last year or date code on the clasp that is paired with a PAT PEND divers extension?

- What is the current market value of a PAT PEND diver’s extension? (Separated from the bracelet) I searched old FS postings on other boards and prices ranging from $500 $900 over the last few years.


Thanks in advance!
Arron

[TimeToGo]

The information below is from Mark Lerman's write up on the Red Subs.

1. The 9315 Folded Link is considered the correct bracelet model for the Red Sub.
Here are the important points to note:
The model 9315 should be stamped just prior to the end piece on at least one of the links.
The correct end pieces are stamped 280 or 380
The clasps were date stamped from 67 to 72
Clasps without date stamps are from 1973+
The folded bracelet was manufactured until the late 1970s
The earlier version of the bracelet is known as the Patent Pending and is more expensive for its rarity and from demand by Double Red Seadweller collectors. They are stamped from 67 to 70 on the clasp and have Pat Pend stamped on the diver expansion when it is unfolded.
It is not critical to have the exact year of your watch stamped on your bracelet or the date on the caseback.
A bracelet that is dated a year or two after the caseback is perfectly fine.
Unfortunately in order to shorten the bracelet, links have to be removed by a watchmaker or jeweller.
It is also difficult to reinstall the links once removed and the links will be bent out of shape.
Even bracelets found in superior condition tend to be very loose and feel flimsy when compared to modern bracelets, therefore most people find that they do not make a good daily wearer.

[Poohsan]

Thanks TimeToGo!

" ... Patent Pending ... are stamped from 67 to 70 on the clasp..."
This is exactly the info what I was looking for. Unfortunately I let a 70 clasp slip through my fingers.

I decided to part out the bracelet and sell the diver’s extension. This should help fund a newer 93150 for one of my subs.

[Styles Bitchley]

I've got a PAT PEND 9315 that doesn't seem to have a year. It's attached to my '69 Mk IV Red Sub and I believe it to be original. Nevertheless, I'd like to know why there's no year and what the stamp refers to. Hard to see what it is after all these years but it looks like a C, G or maybe a 6? Anyone seen this before?

[scooba]

I have two PP 9315s one is 2/70 the other 3/70 , I have also had Rolex add two links to mine and it was returned like new fabulous work at RSC UK