Can you replace a triplock 24-7030 tube with a correct twinlock 24-7000 in a 5513?

[g-boac]

Got into a conversation with another customer at my local AD. He said it's not possible to retrofit a vintage sub (specifically, the 5513/5512s that originally came with twinlock crowns) back to a twinlock crown, because you have to bore out a larger diameter hole and tap a new thread into the case when replacing the tube. That makes no sense to me - on a couple of different levels (both manufacturing, and service) - but he was insistent.

I was under the impression that in order to switch crowns, you needed to also switch tubes - but that the process was as reversible as having your watchmaker screw one out and screw the new one in. And that the real trick at this point lies in sourcing the correct parts.

Can anyone shed light?

thanks!

[1675-David]

You are 100% correct

[g-boac]

yes!! That's super news! Thanks David!

[cptnbob]

Any idea where to find an image of the twin lock stem. I ended up with a old rolex oyster perpetual, I believe its a 1520. I'm trying to eliminate all the "frakin" parts and get it close to real, about 95% there, but the stem is broken. and the stem is unusual. inside the crown is a small tube with a spring. It unscrews from the crown body, I believe its 5.3, this is baffling..............darn,,, my photo's are on the other computer. any input.....

[gileto]

I've switched (my watchmaker) the 24-703 / 24/7030 with the original 24-700 / 24-7000 set and it fits perfect on my 1967's 5513.

before with 703/7030



after with original 700/7000

[gileto]

twinlock 24-700

[J!m]

Yep. Just change tube and crown together.

700, 702 and 703 all have their own unique tube.

[cptnbob]

Offensive frankin part identified, removed and replaced, thanks