The Naylor is a touch tighter than the 1250, I have had both. The Naylor is still being made....
I Think they both sound pretty close to Weber 12F150 series. Tone Tubby ceramic is also similar-ish, and thats what I ended up with, it seemed to have a little more clarity and punch.
I don't believe they're identical, but they sound close enough to be twins. I've tried the Alltone and the Sig12B back to back in my Carvin Nomad and there really wasn't much discernible difference.Isn't the Weber Sig 12B the same speaker or am I misinformed?