The car of Edgar(d) Markiewicz, aka "Marko", who was from Geneva, after his accident in lap 16 during the Belgian GP at Spa on 9 May 1933. Markiewicz took over #4936 for the 1933 season from Willy Escher / Ecurie Braillard.

#20 the 9th July 1933 with Markiewicz and 695-L (CH), T51

July of course, typo, sorry....!
Car was definitively a T35C, I have a photo showing the compressor hole.
And I sincerely doubt that at that occasion it carried Escher's personal registration number.

4936 with Braillard (Ecurie Braillard) in 1932 at 1934 with 695-L (CH)
4936 with Edgard Markiewicz (Ecurie Braillard) in 1933 (with 695-L (CH) ?)

- #6 II° Grand Prix de Nîmes, 4th June 1933, Louis Braillard 5th (T35C )
- #36 II° Grand Prix de la Marne, 2nd July 1933, Louis Braillard DNF, (T35C with 695-L (CH))
- #20 IV° Grand Prix de Belgique 9 July 1933 - Spa-Francorchamps, "Marko" (Ecurie Braillard) (T35C)

4936 avec Type 51 engine (T35/51) for :
T35/51 with #18 Grand Prix de Montreux, 3rd June 1934, Louis Braillard DNF

IV° Grand Prix de Belgique 9 July 1933 - Spa-Francorchamps
#20 "Marko" T51 (http://www.teamdan.com/archive/gen/1933.html#gpb)
#20 "Marko" T35B (http://www.kolumbus.fi/leif.snellman/gp3310.htm)
#20 "Marko" T35B (http://www.wikif1.org/Grand_Prix_de_Belgique_1933)
T35C or T51 Can you show us a photograph ? Thank

No, I do not make my private archive public!