Franck, those are some really cool looking trucks. I'm not that familiar with European trucks, what are some of those? The Volvo show truck, are those miners on the murals?
Vive la France!
Yes the "paint" on the Volvo represents Miners, in rememberance of the coal mines exploited in the Nord-Pas-de-Calais till the 90's and the hard life of their workers and families had.
Concerning the truck pics, I'm not an expert, so it will be very global :
the 1st one is a Volvo F 88 (Sweden) produced from 1965 to 1977, a real success story in Europe.
The 2nd one is a Scania 111 (Sweden) from 1958(L75) to +/- end of the 70's (111)
The 3rd one is a Hanomag-Henschel F 221 (Germany) the company no longer exist and was bought by Mercedes
The 4th is a Berliet (France) TR 280 : 1978 to 90's. The company is under RENAULT flag since 1978 but the cab design of this truck was used until the early 90's with some face liftings and improvements
the 5th is a SAVIEM (France) TP170 : belongs to RENAULT since 1955 In fact four companies were grouped under SAVIEM brand : Latil-Renault-Somua-Floirat