The so called dot over 90 Tachymeter bezel is/was found on straight lugs Speedies like Ref. CK 2998, 105.002 & 105.003. True or False?

Note that I'm trying to (1) understand the Speedmaster models and (2) figure out how not to get scammed when I make my first purchase of one 145-022-67/68. Any help clarifying this would be greatly appreciated!

For the Cal. 321 Speedie [including Cal. 861 Ref. 145.022 transition timepieces that's identical[??] to Cal. 321, except Cal. 861 movement] the correct Tachymeter bezel would show a dot located at 70. ???

Please, just need a wee bit o help to the try thoughts straight because this still seems confusing to me.

Thanks very much, in advance.

 

I think ALL the caliber 321 Speedmasters had a dot over 90 bezel.

 

yes, and early 861's had them too. I cannot be sure when the change happened, and I think when the change happened, the two types of bezel were fitted concurrently.

i am not sure i have ever seen a 145.022-67, but a -68 will be a transitional, in that it should have the dial from the earlier reference, and the DON bezel.

 

Thanks !!

therefore, even the transitional 145.022-68 will show DON. Awesome

 

got a 145.022-69 on my wrist with a dot over 90.

 

Accordingly, the first rule of Speedmaster Club is: "All cal. 321 Speedmasters had DON, but only a few cal. 861's had DON, and no other cal. Speedmaster had DON."


With a little further information we could further hone this rule with the addition of "there was not a DON on any cal. 861's [beginning with case ref. #(?)][produced after (?)]."

 

Interesting - Thanks.

So really,

transitional 145.022-68 Cal 861 ma or may not have DON ...​

 

Change takes place on 145.022-69 around 30.58-30.59 mios

 

ALL that being said so far, it seems ok to take the plunge on a 145.022-68 Cal 861 withOUT the DON ???

 

Wow. Easier than I thought.

 

That's when an expert explain things. Simple explanation for what most people think complicated.

 

It's not so simple regarding 145.022-69 with premoon caseback. As I wrote earlier, DON until 30.59 mios, with a short overlapping period, no-accent tachymeter starting at 30.58...

 

I'm learning from you all. Thanks!

I'm told this is a 145.022-68. I don't think it is. BUT, Looking forward to your reviews/thoughts -->
l

 

The only way to be sure is to get a photo of the case ref number inside. If it is a -68 the bezel is wrong, but they were often replaced, I wouldn't call it a deal breaker as the DON's do come up for sale (at a price.)

 

i would value this watch $400 less because of the incorrect bezel.
as others say, open it up.

 

I would more rely on caliber and its s/n. A caseback can be changed....

From the dial, it can be a 105.012-66, 145.012 or 145.022-68. The transition of the chrono second hand took place during 145.012 production, but it is not totally irrealistic to have such a hand with 145.022-68.

 

oops sorry, not likely to be a 105.012-66, due to pushers.