I don't know how old this tram is, but I'll try to find out.
Edit: I've already got help from a friend, who sent me this link (only Norwegian). It says that this is a veteran tram called "70". It was built in Hamburg, Germany, and was delivered in 1913. It was in use until 1968, and was restored for the 100th anniversary of running electrical trams in 1994.
The tram can be rented for parties, making of movies, weddings etc. There is room for 52 passengers in the first motor car and 52 passengers in the towed vehicle.
What a great idea for a special party!