Argh I got the wrong tube. What crown is this?

[red series 3]

O.k I think I need somebody to get the school bus out and drive it over to pick me up.

I think I am o.k with the daytona project and then something "basic" like ordering the correct tube for this crown and I failed.

So can somebody please confirm what this crown is (I think 702 but the huge price of 7020 tubes makes me want to confirm)

Pick me up in the bus. I need to be schooled

[Original Scope]

703!

[red series 3]

I ordered a 703 tube.

That's what I thought as well.

But the tube arrived and it does not screw down...

Scrambling for watchmakers toolkit grabbing a loupe looking at the threads on the crown after your post

Edited July 4, 2012 by Red Series 3

[Tonyyammine]

Maybe the tube is wrong or the crown is stripped

[red series 3]

That's what I was thinking maybe threads stripped in crown.

But... No the loupe confirmed something even simpler. There was an o-ring at the base of the crown that was preventing the tube getting to the threads.

Its o.k everybody stop panicking.

I did order the right tube.

Turn the bus around.

[woof*]

Can we see the rear and a side view?

[Tonyyammine]

Good to hear

[red series 3]

I'm thinking I might be too heavy handed to work on watches.

I tapped the thread for this to m3 x0.35 I countersunk and counter bored the hole. I searched for pics of builds to get an idea on how far from the case this should sit. I read somewhere that the wrong thing to do is get it flush and have the crown sit too close to the case.

I have been through all of freddy333 content looking for good pics of builds he has completed. As I think he gets this area right.

I got to the point where I was happy with how deep the tube sat in the case. I removed it fitted the seal between tube and case wound it in. I was using a tapered spline from an alternate tool that fit the tube. I thought i would give it another quarter turn and turned the head off the tube. It unwound fine without damage to the case with just another tapered spline.

But I though I would ask if this has ever happened to anyone before. I was using a clarks 703 tube and gen crown.

I was happy with the quality of the tube. I think it is just me using the wrong tool for the job.

[freddy333]

The threading on 702 & 703 crowns differ & you will need a 7020 tube. Sorry, but I think you may have to bite the bullet on this 1 (or eat the 702 crown in favor of a 703) .

The '703's in these pics may be 704s (same appearance, but crown is solid (704) vs wrapped (703))

[correctime]

That's GREAT info FREDDY....thanks for sharing

I've just acquired a New sealed 24-7020 tube that I can't use...and open for trades.

I need a early 703 crown for the 16800.

I thought the crown I had was a 702 because the threads in the crown come all the way up to the machined bevel.

It's not...and I don't know what it is but it isn't a 702..the 24-7020 won't fit inside it.

It will screw on perfectly to a 24-7030 tube but bottoms out just as it reaches the outer tube seal...and it has the 702 /early 703 style coronet on it.

Any ideas ???

Edited August 3, 2012 by correctime

[correctime]

What tube does the 704 fit ??

[freddy333]

703/704 = 24-7030 tube

[Nanuq]

I've just acquired a New sealed 24-7020 tube that I can't use...and open for trades.

Man, I need that tube! What do you need in trade?

[correctime]

703/704 = 24-7030 tube

Ah...then it seems mine having the threads in the crown that come all the way to the top makes it a 700.

Any idea what tube the 24-700 needs ??

[correctime]

Man, I need that tube! What do you need in trade?

Check your PM Brother

[Nanuq]

Freddy, I think your picture is mis-labeled. From left to right those should be: 702, 703, 704

702 - threads to the end, wrapped

703 - threads only up inside the crown, smooth near the opening, wrapped

704 - same, but solid, not wrapped

701 cross section

702 profile

702 vs 703

704

[freddy333]

Any idea what tube the 24-700 needs ??

It currently resides here

[Nanuq]

BAM, there she is. Lovely watch.

[woof*]

Great picture.

[correctime]

Beautiful watch Freddy.

Thanks for the info

[correctime]

BAM, there she is. Lovely watch.

Confusing.

I have a gen 7mm crown that screws right onto the 703 but only down as far as the outer o'ring.

What crown would that be ??

(the 24-7020 tube won't even fit in it.)

[correctime]

Turns out the crown I picked up is a 24-700

Now I'm stuck with a NOS 24-7020 tube and 24-700 crown I can't use

Thanks for the info Freddy.

[red series 3]

I hope i didn't do it again, I was looking at freddy's pic and started thinking oh no thats a 702. I just bought this off another member can anyone confirm what series crown this is.

Thanks

[tjlocker]

It's either a 702 or a 703. Take a picture of the back side and it will be clear.

[correctime]

The threads on the 702 come all the way to the edge of the outside, as do the threads of the 700.

The threads on the 703 start about midway in the crown.

Edited August 15, 2012 by correctime