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skprd13 · 3 May 2013, 04:03 PM

Excellent post! Learn something new everyday.

Aloha from Kauai.
Tom

sueno213 · 13 May 2016, 10:32 AM

Very good info. Why does Breguet Transatlantic xx1 have indices every two minutes on the 30 minute scale?

brinktime · 15 August 2016, 02:47 AM

Thanks for the fun sunday-fact :)

Dimik · 18 March 2017, 03:01 AM

Hi guys, thank you for providing guidance on how to read the bezel. But I have a question about how you would read it if the process is longer than a minute? E.g. 1 car completes a 1 km lap in 1:30. What is the speed then?

Mellow Mike · 18 February 2018, 07:22 AM

The answer is 40 kph. The time is 90 sec. divided by 2 shows speed of 80 kph then divide 80 by2 = 40

Goschi10 · 19 July 2018, 05:50 AM

Quote:

Originally Posted by Gurmot

Another great article, and very useful too but aren't we forgetting another member of the Speedy bezel family?

Here's my 1967 cal 321 Speedy with a Pulsations or Doctor's bezel. It is used to measure heart-rate by recording the time it takes for 15 heart-beats. The watch is stopped after the 15th beat and the equivalent BPM is displayed.

What do you reckon to this one?

Cheers - Simon

This is an absolutely incredible piece

heritagewatchdealers · 5 December 2018, 02:55 AM

Thank you!

watchprenuer · 5 April 2019, 06:36 AM

great info thanks

alexmiranda · 31 May 2019, 01:56 PM

Very informative post, showed this to a friend which is also an Omega fan.

Pedrovasques · 16 June 2019, 11:56 PM

How can you calculate on a 116500?

schoolboy · 10 July 2019, 02:14 AM

Quote:

Originally Posted by Pedrovasques

How can you calculate on a 116500?

The exact same way

CEG · 14 November 2020, 05:55 AM

Great post for the Omega newbie!

johnny.tran1 · 28 July 2021, 04:28 PM

Great info

luchion20 · 27 August 2021, 07:47 AM

The more you know... thanks for the info

wrussell46 · 12 January 2023, 05:18 AM

Reading this makes me more excited for a Speedmaster!

These watches are such a cool piece of kit, form and function at its best.

Michi K. · 7 December 2023, 07:55 AM

Quote:

Originally Posted by Mellow Mike

The answer is 40 kph. The time is 90 sec. divided by 2 shows speed of 80 kph then divide 80 by2 = 40

The tachymeter bezel and the minute track "switch" places for times greater 60 seconds

Let's use the example from above:
The time reading is 90 seconds.
Next, look up the "90" on the tachymeter bezel. E voilá: the minute track reading is 40 (=40kph/40mph).
If you have a time reading of 3 Minutes (=180 seconds). Check "180" on the bezel... *Bam*: approx. 20kph/20mph.

The reading on the bezel starts to run "backwards" (for time readings greater 60 seconds)... in this way, you are able to measure speeds as slow as 7,5 kph/mph (=500 seconds)

Cheers,
Michael

Gesendet von meinem SM-G950F mit Tapatalk

14 November 2020, 05:55 AM	#42
CEG "TRF" Member Join Date: Aug 2007 Real Name: Dan Location: ENGLAND Watch: 116505 Posts: 1,587	Great post for the Omega newbie! __________________ 16710-116505-116660-116680-116610LV-216570-126331-116710-114060-126621-TudorGMT-Tudor BB58-Sapphire Speedy Pro-Speedy Rising Sun

3 May 2013, 04:03 PM	#31
skprd13 "TRF" Member Join Date: Feb 2013 Real Name: Tom Location: Kauai Watch: 1675-1680-16750 Posts: 3,346	Excellent post! Learn something new everyday. Aloha from Kauai. Tom

13 May 2016, 10:32 AM	#32
sueno213 "TRF" Member Join Date: Sep 2012 Location: California Watch: fpj tantalum bleu Posts: 68	Very good info. Why does Breguet Transatlantic xx1 have indices every two minutes on the 30 minute scale?

15 August 2016, 02:47 AM	#33
brinktime "TRF" Member Join Date: Aug 2016 Location: Sweden Posts: 3	Thanks for the fun sunday-fact :)

18 March 2017, 03:01 AM	#34
Dimik "TRF" Member Join Date: Aug 2016 Location: London Posts: 11	Hi guys, thank you for providing guidance on how to read the bezel. But I have a question about how you would read it if the process is longer than a minute? E.g. 1 car completes a 1 km lap in 1:30. What is the speed then?

18 February 2018, 07:22 AM	#35
Mellow Mike "TRF" Member Join Date: Oct 2016 Location: NJ Posts: 2	The answer is 40 kph. The time is 90 sec. divided by 2 shows speed of 80 kph then divide 80 by2 = 40

5 December 2018, 02:55 AM	#37
heritagewatchdealers "TRF" Member Join Date: Oct 2018 Real Name: KM Location: United States Watch: Calibre de Cartier Posts: 666	Thank you!

5 April 2019, 06:36 AM	#38
watchprenuer "TRF" Member Join Date: Apr 2019 Location: united states Posts: 92	great info thanks

31 May 2019, 01:56 PM	#39
alexmiranda "TRF" Member Join Date: May 2019 Real Name: Alexandre Location: Portugal Watch: Rolex Sky-Dweller Posts: 18	Very informative post, showed this to a friend which is also an Omega fan.

16 June 2019, 11:56 PM	#40
Pedrovasques "TRF" Member Join Date: Jun 2019 Location: London Posts: 2	How can you calculate on a 116500?

28 July 2021, 04:28 PM	#43
johnny.tran1 2024 Pledge Member Join Date: Jul 2018 Location: Houston, TX Posts: 372	Great info

27 August 2021, 07:47 AM	#44
luchion20 "TRF" Member Join Date: Jul 2021 Location: New York Posts: 1	The more you know... thanks for the info

12 January 2023, 05:18 AM	#45
wrussell46 "TRF" Member Join Date: Jan 2023 Real Name: William Location: Las Vegas Watch: All of them Posts: 5	Reading this makes me more excited for a Speedmaster! These watches are such a cool piece of kit, form and function at its best.

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