Comments:
Model from 1927 made for King Alexander I of Yugoslavia (credit: Sotheby’s)
Ref. 2990 ? (case n° 251050) from the 20s (credit: invaluable)
Ref. 2990 from 1930 (credit: Hodinkee)
b) With pulsometer scale
Model from 1928 with Stuart pear hands (credit: bexsonn.com)
Similar model with baton or sword (?) hands (credit: Horas y Minutos)
Similar model with B r eguet hands (credit: Davide Par m egiani)
Ref. 3410 from 1931 (credit: Davide Par m igiani)
B. MODERN MODELS
(credit: Hodinkee)
b) Harmony ref. 5300S/000R-B124 with cal. 3300 (2016 edition of the previous model, with anthracite numerals instead of blue on the anniversary edition)
(credit: Hodinkee)
(credit: H.M.Timepiece on FB)
(credit: Horologium)
(credit: the watch observer)
c) Traditionnelle ref. 5100T/000R-B623 with cal. 3200
(credit: Watch I Love)
d) Traditionnelle ref. 5100T/000P-H041 with cal. 3200 (Collection Excellence Platine)
(credit: Watch Collecting Lifestyle)
(credit: Sjx)
(credit: a blog to watch)
(credit: Hodinkee)
Vacheron Constantin Monopusher Chronographs
All the models I could find with only one pusher to start, stop and reset the chronograph.
Enjoy!
A. VINTAGE MODELS
1/ Round case ref. 3307 (13 ligne caliber based on an ebauche by the brothers John and Charles Reymond - later known as the company Valjoux)
Model from 1927 made for King Alexander I of Yugoslavia (credit: Sotheby’s)
Model from 1929 with black hands (credit: goldammer.me courtesy of Phillips)
2/ Cushion case
a) Without pulsometer scale
Ref. 2990 ? (case n° 251050) from the 20s (credit: invaluable)
Ref. 2990 from 1930 (credit: Hodinkee)
b) With pulsometer scale
Model from 1928 with Stuart pear hands (credit: bexsonn.com)
Similar model with baton or sword (?) hands (credit: Horas y Minutos)
Similar model with B r eguet hands (credit: Davide Par m egiani)
Ref. 3410 from 1931 (credit: Davide Par m igiani)
B. MODERN MODELS
1/ Without tourbillon
a) Harmony ref. 5300S/000R-B055 with cal. 3300 (model launched for the 260th anniversary of the brand, in 2015)
(credit: Hodinkee)
b) Harmony ref. 5300S/000R-B124 with cal. 3300 (2016 edition of the previous model, with anthracite numerals instead of blue on the anniversary edition)
(credit: Hodinkee)
2/ With tourbillon
a) Harmony Ref. 5100S/000R-B125 with caliber 3200
(credit: H.M.Timepiece on FB)
b) Harmony Ref. 5100S/000P-B056 with caliber 3200
(credit: Horologium)
(credit: the watch observer)
c) Traditionnelle ref. 5100T/000R-B623 with cal. 3200
(credit: Watch I Love)
d) Traditionnelle ref. 5100T/000P-H041 with cal. 3200 (Collection Excellence Platine)
(credit: Watch Collecting Lifestyle)
(credit: Sjx)
3/ Split seconds
a) Harmony ref. 5400S/000P-B057 with cal. 3500/260
(credit: a blog to watch)
b) Traditionnelle ref. 5400T/000P-B637 with cal. 3500 (Collection Excellence Platine)
(credit: Sjx)
(credit: Sjx)
4/ Les Cabinotiers Minute Repeater Tourbillon Split-Seconds Monopusher Chronograph with cal. 2757 (there are 2 pushers for the chronograph on the right – one (at 2:00) for start, stop, and reset, and one (at 4:00) for the split-time function)
(credit: Hodinkee)
I've never been a fan of the puslometer.
My personal preference goes to the ultra-thin Harmony Split-seconds.
Any Split Second for me! All manufacturers with automatic movements should have these "invisible" rotors! Thanks for this very informative post! Best, E.
The platinum ultra-thin Harmony split-seconds is my personal favorite.
Thanks for looking.
Yes, the Harmony case was very nice, though
too large and thick except on the ultra thin models and on some less complicated ones.
Me too!
I have no clue why VC decided to pull the Harmony line. It is as beautiful as it is distinctive.
The Harmony split-second stands out to me, but of course all examples are extremely nice.
What a great lineage...
All of these watches are stunning. It's a great lineage.
The dial proportions of the early Ref 3307s are the best to my eyes. The subdials are large, but not too close to the centre stack. The spirit of these early watches is found in the modern Patek 5959 (sorry).
The modern Harmony Chronograph Pulsometer goes in the opposite direction, being quite large and thick for a dress chronograph. It's grown on me over the years, with the larger dial being suited to middle- and old-age eyes. Makes sense as retirement age gets moved out. Vacheron hasn't ignored the anglage, even on the base level chronograph, though it appears to be more pronounced on the tourbillon chronographs.
The Harmony and Traditionnelle Ref 5400S have amazing proportions for split seconds chronographs, which means they should not be safe queens.
Thanks for you insight.
I completely agree with. I’ve posted a new thread concerning the 5959 and other PP split seconds chronographs. Best, Emmanuel
A favourite complication
The cushion case is very pleasing to my eyes too. Thanks for putting this together 
V&C’s first monopusher wrist chrono came out in 1917. There are a few more to add to your compendium here: www.watchprosite.com
/
Best of the Hour Lounge Wrist Chronographs
V&C’s first monopusher wrist chrono came out in 1917. There are a few more to add to your compendium here: www.watchprosite.com
/Best of the Hour Lounge Wrist Chronographs
One of the splits here for me, Quattro!
And I quite like their cushion-shape examples.
Interesting...
quite a few of these come in cushion shaped cases.
My favourite is the Traditionnelle 5400T/000P - the Cal 3500 is absolutely stunning.
Thanks for another informative post.