
This photo that radiojwk posted in the older thread shows that finish, on the curved edges of the decorative arch, are of a different texture then the rest of the archway. It looks to me that the center of the arch was carefully extracted, edges curved and smoothed, and the refinished. The entire wood surface doesn't look like it has the same single coating of factory lacquer. At least, right now, the finishes look to have been clear coated or varnished over.

As far as the hole in the chassis where the tuning eye cable threads through, every RCA T10-1 chassis features that hole. The RCA C-11, which uses the same chassis as the T10-1 but fitted with an arch dial, does use that extra hole for it's tuning eye.
I'm still not convinced that this was factory done.

If this was an original factory job, a bare metal tube socket would have been used as was in this C-11 chassis. Does either RCA T10-1s use this very same bare metal tuning eye tube socket? I'd love to see if the tuning eye bracket, which holds the tuning eye in place, to see if it's the same type that RCA normally used in their 1935 line of radios. If
BOTH T10-1s feature the exact same type of bare metal tube socket and mounting bracket that the C-11 and other 1935 RCA radios used, I'd be very open to the theory that these add ons were factory done.
A really detailed closeup photo of the RCA T10-1 (Lot 601) would be very beneficial to this discussion.