Witherby no. 110 block plane
by
, 08-13-2018 at 2:06 AM (475274 Views)
That is a product with the Witherby name and likely nothing to do with the T H Witherby legacy, at least to my knowledge.
It may be someone who had rights to use the name. It may be the trade mark to the name has become public domain.
There is also Witherby Publishing, seems to be mostly maritime titles.
More research would be in order if it is something you have to know.
jtk