Good quality, heavy duty cutlery Jer! The cleaver was made by Johann Friedrich Dick. He founded his famous company in 1778 in Esslingen, Germany. (F. Dick is the same company that makes that superb vertical stuffer everyone loves). I remember you posting info about your own Dick stuffer
http://wedlinydomowe.pl/en/viewtopic.php?t=5027 ... so I know you're well acquainted with this fine company.
In another life, I owned and operated a cutlery shop for over 40 years. I saw many pieces like this and I believe the steel you have is probably good ol` 01 oil-hardening, hypereutectoid .85+ carbon steel. I would imagine that the hardness is just below 57 Rockwell "C". In my opinion, it`s still the best all-around cutlery steel if you are not comparing it to today`s stainless steels. It`s easy to sharpen and just takes a few strokes on a steel to sweeten the edge again after using it for some time. You can make it look great by using a little scouring powder and some 00 steel wool on it. When you get it all cleaned up, rub a little vegetable oil - (not animal fat oil) into the surface pores. (Yes, believe it or not, steel has microscopic pores). Citric acid will turn the steel black if you don`t wipe it off immediately after cutting fruits and vegetables. Put a new edge on them after you put some moisture back into the wood on the handle with something called "French Polish" - a homemade finish you can make yourself. The handle will look terrific again by mixing a little boiled linseed oil into orange shellac and then using a small wad of cheesecloth to rub little circles of the mixture into the wood. Allow it to dry, sand lightly, and rub more mixture into the wood. This is called "French Polish" and it will make those babies look terrific. As you know, the cost (new) of these two heavy-duty, quality items is about $150 in a retail store. It`s hard to find that quality cutlery anymore. I`m glad you`ve got some of the "good stuff".
Best Wishes,
Chuckwagon