The motorcycle in the foreground appears to be a Jawa Type 353 motorcycle. I don't know a lot about motorcycles, but Wikipedia will indicate that (if this is a Type 353), it would have been built between 1954 and 1962. Wikipedia claims that the displacement of the single-cylinder engine visible in this photo would have been 249.5cc. These motorcycles actually remain fairly common in everyday use in the Czech Republic, although the Jawa Moto company has long since moved on to more modern designs. About 10 or 15 years ago, I saw a much newer Jawa (I have no memory of the model) on sale in a Tesco supermarket for around 10,000Kc, or roughly $442 U.S., so their popularity may be down to their being spectacularly inexpensive, even if it could be presumed that a new Jawa today would be more than 10,000Kc.

en.wikipedia.org/wiki/Jawa_353