I recently bought i really nice hammer on the Swedish equivalent to ebay (blocket.se) the price was even nicer 3000kr about 400USD. The hammer is in very good condition. The hammer head (missing in picture) weights about 48kgs. There are control wheels for stroke length and for the height of the hammer head.
The hammer looks like a marriage between a Bacho and a Klafrestöm, both Swedish.
There is no brand names on the hammer. Does any of you know what kind it is?
Robin

An interesting looking hammer, it uses a similar sliding linkage to a Blacker.

Isn´t Blackers those crasy looking hammers that uses a regular anvil? in that case there are no simmilaritys.
Oh and i forgot to tell that the flwheel and crank is also missing in the foto, its located in the whindov at the bottom.

Yes they are and watch my lips, that hammer uses the same sliding linkage.

As far as I can tell from the photo your hammer has a similar banana shaped linkage as the Blacker. The further the linkage slides away from the pivot point the greater the amount of travel the hammer has. Your hammer uses leaf springs while the Blacker uses coil springs but essentially the principle is the same.

http://www.nevillebarnes.co.uk/hammer.htm

Sorry, i missunderstood you, the word linkage made me think of those scary arms flying around, dont know why. English is not my first language. And yes, you are right about the banana.

Keep the banana well oiled to reduce the number of sudden violent hits!

Very interesting indeed. Of course the sliding block on a Blacker is connected to the treadle and this is a static adjustment, but same idea for varying the stroke.