janarn

From what I know Marshall started using Greenbacks very early '66.
Before that they used Celestion 15w alnico speakers.
They were the same speakers that was used in Vox amps.
The speakers were painted blue, later silver for Vox.
The speakers that Marshall used were silver, without the magnet cover
that Vox speakers had.
I have Greenbacks from March and April '66, so silver alnicos has to be earlier
than that.
You have to post som pictures og that cab. It could be a '64 or '65 cab.