Geneva Speed Trials 1920s

I beleive that international 1 km speed trials were held in Geneva in the mid-1920s. The only thing I know was that Rene Thomas won the 1924 event with a 12cyl Delage. Hans Etrodt's excellent work on hill climbs does not, of course, cover such "flat races". Can anyone provide more information on dates, results and the venue?
RAP

Usually took place at Eau Morte (or Eaumorte) around March. Perhaps an Easter date

I’m unsure of the protocol of posting twice in succession, but on the other hand no-one else seems to have wanted to respond...
The venue for the Geneva kilometre was Eaumorte in the early years, but by 1931 - and possibly before - had switched to Grand-Sacconex
I make no claim to the accuracy of the following list, as it has been compiled from a variety of sources, many unsupported.

1923 18/03
Delage 5.1 (René Thomas)
1924 16/03
Delage 10.5 (René Thomas)
1925
Delage 10.5 (Albert Divo)
1926
Mercedes 24/100 (Otto Merz)
1927
event apparently held, but nothing known
1928 19/03
Austro-Daimler (Hans Stuck?)
1929 17/03
Mercedes-Benz SSK (Adolf Rosenberger)
1930
nothing known
1931 08/03
Bugatti 35B (Hans Stuber)
1932 13/03
Bugatti T51 (Hans Stuber)
1933 12/03
Bugatti T51 (Hans Stuber)
1934 18/03
Maserati 8CM (Hans Ruesch)
1935
Maserati 8CM (Hans Ruesch)

Info in red is from the results section of Stuck/Burggaller.

Originally posted by David McKinney
I’m unsure of the protocol of posting twice in succession, but on the other hand no-one else seems to have wanted to respond...
The venue for the Geneva kilometre was Eaumorte in the early years, but by 1931 - and possibly before - had switched to Grand-Sacconex
I make no claim to the accuracy of the following list, as it has been compiled from a variety of sources, many unsupported.

1923 18/03
Delage 5.1 (René Thomas) 21.3"
Touring cars: M Malardier (2.5 Slim) 31.9"
1924 16/03
Delage 10.5 (René Thomas) 17.69"
Touring cars: A Schmid (3.0 Alfa Romeo) 31.35"
Sports cars: M Alfter (2.0 Bugatti) 30.4"
1925 22/03
Delage 10.7 (Albert Divo) 18.0"
Touring cars: A Goy (3.0 Cottin-Desgouttes) 30.0"
Sports cars: Ch Ortmann (4.8 Panhard-L) 23.2"
1926 13/04
Merz won both the touring and sports car classes, with times of 24.7" and 24.5" respectively. The racing car class was won by H Kracht in a 1994cc Bugatti in a time of 21.6"
1927 06/03
event apparently held, but nothing known Not any more!
Racing cars: Martin (1.1 Amilcar) 21.6"
Touring cars: Hürlimann (6.2 Mercedes K) 25.1"
Sports cars: Delmar (4.3 Steyr) 22.5"
1928 18/03
Austro-Daimler (Hans Stuck?) Neither, apparently!
Racing cars: (two classes) Martin (1.1 Amilcar) 20.03" and Heusser (2.3 Bugatti) 19.74"
Touring cars: Büttikofer (4.4 Martini) 30"
Sports cars: (two classes) von Wentzel-Mosau (6.8 Mercedes) 21" and Freuler (4.9 Steyr) 23"
Round about here things get confused! Until 1928 this was a flying kilometre, but there were two further events at Eaux-Mortes, both employing standing starts. That may mean that the reference to Stuck above and all your subsequent results may refer to Grand-Sacconex? (But see below re St Moritz.)
For 1929, on the same date as you have:
Racing cars: Strittmatter (1988cc Bugatti) 31.9"
Touring cars: R Duval (4.1 Chrysler) 41.1"
Sports cars: Escher (2941cc Bugatti) 34.4"
For 1930, on 23/03:
Racing cars: Stuber (1922cc Bugatti) 29.5"
Touring cars: Zwimpfer (4.4 Chrysler) 41.3"
Sports cars: Escher (1992cc Bugatti) 32.7"

Rosenberger did win a flying kilometre at St Moritz in August 1929, but not apparently in an SSK. Chiron won the same event in 1930.
1929 17/03
Mercedes-Benz SSK (Adolf Rosenberger)
1930
nothing known

1903, May 18	Eaux-Mortes (w. of Geneva), 1st – (1 km? f/s)			 CH	?	?			   			90 km/h	?

1904, ?			 Eaux-Mortes (w. of Geneva), 2nd – (2 x 1 km f/s)	CH	?	?			   		   115 km/h	?

1911, Oct 29	Eaux-Mortes (w. of Geneva), 3rd – (1 km? f/s)			 CH	Nigg,			 Fiat		   145 km/h	?

1914, Apr 26	Eaux-Mortes (w. of Geneva), 4th – (1 km? s/s)			 CH	?	?	?	?

1923, Mar 18	Eaux-Mortes (w. of Geneva), 5th – (2 x 1 km f/s?)	CH	Thomas, René	Delage  5,100 cc	21.30s	R

1924, Mar 16	Eaux-Mortes (w. of Geneva), 6th – (2 x 1 km f/s?)	CH	Thomas, René	Delage 10,690 cc	17.69s	R

1925, Mar 22	Eaux-Mortes (w. of Geneva), 7th – (2 x 1 km f/s)	CH	Divo, Albert	Delage 10,692 cc	18.30s	R

1926, Jun 13	Eaux-Mortes (w. of Geneva), 8th – (2 x 1 km f/s)	CH	Kracht, Hans	Bugatti 1,994 cc	21.60s	R

1927, Mar  6	Eaux-Mortes (w. of Geneva), 9th – (2 x 1 km f/s)	CH	Martin, Charles	Amilcar 1,097 cc	21.60s	R

1927, Mar  7	Eaux-Mortes (w. of Geneva), record (2 x 1 km f/s)	CH	Benoist, Robert	Delage 10,687 cc	17.20s	R

1928, Mar 18	Eaux-Mortes (w. of Geneva), 10th – (2 x 1 km f/s)	CH	Martin, Charles	Amilcar 1,097 cc	20.03s	R

1928, Mar 18	Eaux-Mortes, National (Geneva), – (2 x 1 km f/s)	CH	Heusser, Huldreich	Bugatti T35B	19.74s	R

1929, Mar 17	Eaux-Mortes (Geneva),	   11th – (2 x 1 km? s/s)	CH	Strittmatter,	Bugatti 1,988 cc	31.90s	R

1930, Mar 23	Eaux-Mortes (Geneva),	   12th – (2 x 1 km? s/s)	CH	Stuber, Hans	Bugatti T35C	29.50s	R

Source: AUTOMOBIL-REVUE (Bern)

Thanks for the additions, chaps
I didn't regard St Moritz as equating with Geneva

Thanks very much indeed everyone. Clearly a longer running and more important event than I had realisec. TNF does it again !!

RAP

Originally posted by David McKinney
...The venue for the Geneva kilometre was Eaumorte in the early years, but by 1931 - and possibly before - had switched to Grand-Sacconex...

Grand-Sacconex was a 1 km hill climb. The height difference was 47.42 m with a maximum gradient of 5.7% (or 1 in 17.54 for islanders north of 'The Channel';) ). It consisted of one run in the uphill direction with a standing start (except once in 1935), while Eaux-Mortes was a pure speed trial and run in both directions (2 x 1 km).

The Grand-Sacconex hill climbs can be found on the list 'Hill Climb Winners 1897-1949' - just click on my signature below.

Thanks for the clarification, Hans
Despite the gradient, however, wasn't the course a straight line?

Yes - as straight as the Gaillon course, David.

Originally posted by David McKinney
...I didn't regard St Moritz as equating with Geneva

Besides St. Moritz, the Swiss had other speed trials, like for example the flying Kilometer over the Urner Boden at the Klausenrennen (=Klausen hill climb). Eaux-Mortes was popular because it was part of the Swiss Championship until 1929. Switzerland was the first European country to stage a national championship in 1926. The Americans had theirs long before, btw.

Quid pro quo:
1903: G Perrot (24hp Rochet-Schneider)
1904: Charles Dufaux (Dufaux)

searched & found: additions in red

Note the time for standing start in 1914 versus 1911 f/s!

1911, Oct 29	Eaux-Mortes (w. of Geneva), 3rd – (1 km? f/s)	CH	Nigg,					  Fiat					  [b][color=red]24.4s	R[/color][/b]

1914, Apr 26	Eaux-Mortes (w. of Geneva), 4th – (1 km? s/s)	CH	[b][color=red]Hoffer, Ch. 			 Hispano-Suiza 2.5-liter	46.4s	R?[/color][/b]

1929, Mar 17	Eaux-Mortes (Geneva), 11th – (2 x 1 km? s/s)	CH	Strittmatter, [b][color=red]Jules[/color][/b]	Bugatti 1,988 cc			 31.90s	R