These are extremely large and very powerful veterinary spring lancets. The item is armed by pulling the handles R to L (red arrow). These units are unmarked. A similar item is shown in Davis (pg 96 figure 103). The item in the book is either from a different maker or is defective as all other known pieces have a secondary spring that returns the blade back into the case after firing. The piece is likely German or Danish. Other marks that have been seen on this form include: Tresch A Landshut, and KBLONER.
The screws on the back of the items make it possible to open the case and regulate the depth set mechanism.
Cases open to show the large blades and arming springs.
Large brass spring lancet in a fish skin covered case with black velvet lining. It is very unusual to find a lancet of this style wiith its original case. This item is marked Garantirt. A small spring lancet by the same maker is seen in the section on spring lancets for humans.
Fantastic Hauptner spring lancet. This piece is different than those above in that it is loaded by pulling back on the draw point at the back of the unit. This piece is contained in a nice wooden case with 2 blades. The depth of the cut is controlled by advancing or withdrawing the sloted depth foot at the front of the piece.