Hi Nick,That was dual crystal at one point, The crystal and all components removed and extra bands added with diodes, Better than switching a crystal but a tad messy.
Yep, I was coming to that conclusion myself as I could see that the cans and components were removed as on the other pics from the Ranger Richards these were solder blanked.
Also noted is the additional white plug on the channel selector board, all those wires are not connected to anything other than themselves Red & Yellow wire bonded, green & Black bonded but Orange & Brown free.
So I assume on the 2 crystal version this white plug served a purpose?
Now, I'm wondering since it looks like a donor board whether I should turn to stock 3 band or go for a 6 band as the board was originally.