ship said:Wait a minute and stop. A pre-focus lamp on any Altman fixture designates it at as a 360 not a 360Q. Does not matter what the lens train is because for the most part they are the exact same. In other words, that crazy 360Q you found with the pre-focus (P-28s) lamp base does not have to be a 4.5x6.5 lens train any more than it has to be a 6x16. Different pineapples but other than that, it’s the same fixture.