I did a search as I know this has been discussed quite a bit here. And I thought we had a thread that covered it all. I did not find a thread that included all the different types, so figured I would start a new one. Was wondering if I should just call it the "Official V30 Thread? lol I was just talking to a friend who just bought a set of new Mesa cabs. He was asking me about the difference in the V30's as he seen that I just acquired another set of early 90's Marshall Vintage types. So I was explaining to him what I know about the history and the four (possibly 5/6?) different types. Then I started getting confused myself lol. So I am going to start out with what I have access to at this point in time, which is the two Marshall Vintage 16 ohm I just got. If anyone else wants to contribute here, please do. I want to get all this info straight and in one thread location. I did see elsewhere on the InnerWebZ the info Fryette amps posted. But they made no mention of the Mode 4 version/Hellatone 60L that have the extended low frequencies. I hope I am correct in assuming those are indeed the same. I have a quad of the 16 ohm Hellatone 60L packed away so can not get the numbers off of them. Also, I am trying to get the dimemnsions of the magnets as I read somewhere about bigger/smaller magnets between the V30 types. As I understand it, the Marshall Vintage was the first and made by Celestion in the UK. around 1986. I have two of these in storage form around this period in the 8 ohm version, packed away of course lol. 16 ohm version of these is T3897. Then they started offering the UK made V30 in the early 90's as well. This UK V30 then shifted to the China V30 around 2000. Both the UK and China 16 ohm model is T3904. Please correct me if any of this is off. This one here is something I read online. I read that Mesa had Celestion create a special V30 in the mid 90's that was voiced differently. This speaker is slightly different than the ones they have made for them today. I do not know if there is a difference in T numbers? Now on to the Marshall and Mesa UK made we find today in there respective cabs. I do not know the model numbers on these either. Or are they the same thing as the original Marshall Vintage T3897 16 ohm? Now lastly, is the Mode 4 speakers V30MF 16 ohm T5321. I am figuring these are completely different than all I mentioned before, but the same as the Hellatone 60L. I thought I remember seeing the T5321 model number on my set of 16 ohm 60L's. These are voiced with extended lows. So that actually makes five different types of V30. If you count the standard UK/China T3904 as two, then there is six different types. I just measured the magnet dimensions on the two early 90's Marshall Vintage 16 ohm T3897. They both have the silver frame. Both magnets are .792". First one is June 17 1993 and the magnet diameter is 6.188". The second is May 6 1994 magnet diameter 6.125". Really not a huge difference in the outer size of the magnet. I would like to compile more info on all this here in this thread if anyone else can chip in before I can get to my other V30 types . . . .