From John Stanley Antique Tools -

This listing is for a very nice heavy timber framing slick. Marked - T.H. Witherby, this slick measures just under 3 1/2" coming in at 3 7/16" wide.  Measures 31 3/8" long overall.  The metal part measures 14 3/4" long including the handle socket.  The cutting edge is 3 7/16" wide.  The handle is all good.  As shown there is a shallow 1 inch long chip at the 7 inch mark on the top left edge of the chisel.  We rate this as fine + condition, but will need to be sharpened to your liking.  We have other timber frame chisels listed and we will be listing more chisels and slicks as time permits.  We will gladly combine items to save on your shipping costs.  Be sure to add us to your favorites list!