Picture No. 1
I found a sign on the streamer that is on pennant just below the yellow shield with a black bear. As it appeared later this is a coat of arms of Meulebeke, a town in located in Belgian province of West Flanders. The things that the first and most caught my eye were of course the signs in shop windows. Some more details below.
Picture No. 2
On this lovely picture you can see a shield of Nieuwpoort, a municipality located in West Flanders as well. After I saw these two coat of arms, I thought that possibly both pictures were taken in the capital of West Flanders, which is Bruges[fr.]/Brugge[nl.]. According to google the 'Van Mullem' (that's on the picture called 'Institute de Beaute'), the Pharmacy and 'Falleyn' (the next shop with pink awning) are still there, on Noordzandstraat :)
Here's a picture I found on panoramio of the Pharmacy and how it looks nowadays. Still has the same signboard!
Photo by Ainars M-3
Few details to enjoy the tasty resolution of slides and the retro lettering:
Picture No. 3
I choose this picture, because it was very different from the rest of slides - a little plane, particular colours and pretty fine composition.
I managed to read few words of the small sign that is placed on the bottom of the plane. Apparently the plane is the Spad VII a famous 'Vieux Charles' which was flown by Captain Georges Guynemer untill 1917, when he served with the squadron 'Les Cigognes' (the storks). 'Vieux Charles' is now conserved in Le Musee de l'Air et de l'Espace is north of Paris at Le Bourget airport. But the picture was probably taken in Salle Foch in Paris, according to a photo (same ceiling) I found on www.earlyaviator.com
Georges Guynemer in front of his Spad fighter plane.
The symbol of 'Les Cigognes' squadron, 1916. Quite a fighter stork!
Design by Albin Denis, both pictures via L'escadrille SPA 3