The first V30s were the Marshall labeled Vintages, made for the Jubilee in 87. Crispier sounding. Can only get them from Marshall. After the Jubilee they put them in the AV/BV cabs. Then Mesa had their own version, softer top end and more bottom. Both of these versions you can only purchase from Marshall or Mesa. This is from 87-90 I believe. Then the V30 that can be bought from Celestion was made available in 92? I think...so three versions for sure and some say another 2 more depending on the info source. Hellatone version and the Chinese version, which some say is different and others disagree.