Both of these guitars were 1967 prototypes for a lighter version of the Telecaster that became the Thinline. The spruce-fronted model doesn’t have f-holes, but it is fully hollow, except for a block in the area where the bridge mounts, and it barely weighs 3lb.
It has three-ply binding on the front and single ply on the back, so it’s a little fancier than a regular Telecaster Custom. The spruce doesn’t have eight grain lines per inch or anything like that, but it’s not bad. There’s some lacquer checking but no cracks, and the zebra wood back looks fantastic.