You are buying a 1/2" Baltic birch ply replacement logo mount.

These often get removed on vintage cabinets if people add speaker grills ala Lemmy.

Please specify when ordering if you would like

a 6" logo mount - 1965 to1969, 2-1/2" x 8-5/8"

or a 9" / 11" logo mount - 1969 and onwards , 3" x 10-1/2"

Marshall started using 5/8" deep logo mounts and batons on the baffle at some point in the late '80's if you have a JCM800 cab and want one of these please check the depth of your batons on the baffle so I don't send out one that is the wrong depth.

these are very easy to install - some wood glue a clamp and you're good to go.

These are undrilled for logos as depending on the year the placement of the holes will vary, I also find it more practical to drill the logo holes last once the grill is back on, that way if the logo mount is slightly off centre it doesnt matter as you can centre the logo