Hammering works very well, you have to watch out to keep it straight though. So, you hammer one side or the other until you are happy. I got a bit over enthousiastic though, and made it totally flat. No space for the sawblade anymore! So I had to labourously hammer an old knife in the fold again to unbend it a little. Broke the knife, no fun. Hammering also causes dents, so I had to do a lot of work with files and a bandsander. At the same time I made the taper along the length, about 2 mm less width in the front. And I filed and sanded some chamfers and the nice little round detail at the very tip. Overall, a lot of work for such a little saw.
Inserting the blade into the back was troublesome too. No matter how hard I hit the blade, it wouldn't go any deeper! After all that hammering the blade wasn't quite straight and flat anymore. Luckily I had read a very good article about this problem, and it was no trouble to correct it. Straightening the blade. Have a look around in this blog, it is full of advice.
Next part of a saw is the handle. And you need a bit of wood for that. Original is quarter sawn beech. I have plenty of beech, not all quarter sawn though. I didn't want to dig through the woodstack too much, so I grabbed an offcut from a beech 10x10 cm beam. The wood is a little peculiar, there is quite some spalting going on. I had to do some creative sawing and planing to circumvent a couple of cracks and to make it as QS as possible. This is not the most perfect piece of wood, but this is a workmans saw. And I am sure no workman would have thrown away a decent piece of beech because of some spalting. I am not sure yet how I will saw the handle from this piece of wood, but this is one possibility. (The one on the right is a paper copy!)