Chisel IDs

[JohnPW]

Excellent, thanks!

It seems "Zyto" was used as a brand of lathes by S. Tyzack & Sons as late as the 50s.

There doesn't seem to be much info Zyto woodworking tools though. I have found this:
http://swingleydev.com/archive/get.php? ... t_thread=1
which has this transfer on a moulding plane:
http://www.holzwerken.de/pics/tyzack_logo.jpg

The EC1 (with a number not just EC) postcode seems to date from the end of WW1.

Edit: cross posted!

 

[Shrubby]

S Tyzack of 341-345 old street used the Zyto trademark for all sorts of things . The 1967 picture framing catalogue has a mitre trimmer ,saw bench and combination machine all bearing the logo
Matt

 

[JohnPW]

Another long shot. The top one I've worked out, answer to follow after the photo (if you want to want to guess).

The bottom has CAST STEEL in the second line but the rest of it is hard to read. Possibly 12 letters, starts with ISA...ends with MARDS?

It's Geo P. Preston & Sons, Sheffield.