Well as far as the vintage ones go, There aren't many of them. There are fewer than 200 of them, At least 146. The original had a vibrato* only seen on that model, The vibrato has never been reissued either. The original also has special Mosrite pickups. Here's a few pictures of Tym's Blue Mark II to give you an idea.


I couldn't really tell you the differences between the reissues though, I'm not to savvy about the reissues.
Although widely known as Tremolo, It is really a Vibrato. Vibrato = Alternating the tuning, Tremolo = Alternating the volume.