Brass veterinary spring lancet probably Austrian in origin c.1780-1800. Note the ornate release mechansim and the swans-head finial to the drive spring. The piece is inscribed JS on either side of the nail ridge.
Brass veterinary spring lancet with highly ornate release bar. The inner workings of this piece are very simple. Probably American in origin c.1780. Note the scalloped border on the top of the cover.
Brass veterinary spring lancet, American in origin 1790-1820. Solid primitive design. Broad swoop to the release bar. The borders and cover have a very nice zig-zag pattern. The "nail-nick"is ornately finished.
Very primitive brass spring lancet. American, provenance puts the piece originating in Virginia at the turn of the 19th century. Very simple box design.
Brass Veterinary spring lancets 
Brass veterinary spring lancet probably Austrian in origin c.1780-1800.  Note the ornate release mechansim and the swans-head finial to the drive spring.  The piece is inscribed JS on either side of the nail ridge.
Brass veterinary spring lancet with highly ornate release bar.  The inner workings of this piece are very simple.  Probably American in origin c.1780.  Note the scalloped border on the top of the cover.
Brass veterinary spring lancet, American in origin 1790-1820.  Solid primitive design.  Broad swoop to the release bar.  The borders and cover have a very nice zig-zag pattern.  The "nail-nick"is ornately finished.
Very primitive brass spring lancet.  American, provenance puts the piece originating in Virginia at the turn of the 19th century.  Very simple box design.
Brass veterinary spring lancet with decorative release bar. The item is probably American in origin c.1830-1850. The release is similar to a small piece labeled Chas Traux of Chicago.
Brass veterinary spring lancet with decorative release bar.  The item is probably American in origin c.1800-1810.  The release is similar to a small piece labeled Chas Traux of Chicago.
Primitive brass spring lancet.  This is a single unit piece made by a local craftsman.  It bears none of the hallmarks of a mass produced piece.  The back plate is punch inscribed SW.  The interior has very simple mechanisms and a creative pin to hold the reset spring in place (arrow) .  It is common in items to have this spring missing. 
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Ornately engraved brass and steel Veterinary spring lancet. The piece has a beautifully worked release bar. The item is marked with the makers mark: a reverge "G" and conjoined "B". The leather case is marked with the GB on either side of what looks like a beehive. American in origin c.1780-1800. An identical piece can be found on the Old Sturbridge Village website.
Ornately engraved brass and steel Veterinary spring lancet. The piece has a beautifully worked release bar. The item is marked with the makers mark: a reverge "G" and conjoined "B". The leather case is marked with the GB on either side of what looks like a beehive. American in origin c.1780-1800. An identical piece can be found on the Old Sturbridge Village website.
Ornately engraved brass and steel Veterinary spring lancet. The piece has a beautifully worked release bar. The item is marked with the makers mark: a reverge "G" and conjoined "B". The leather case is marked with the GB on either side of what looks like a beehive. American in origin c.1780-1800. An identical piece can be found on the Old Sturbridge Village website.
Ornately engraved brass and steel Veterinary spring lancet.  The piece has a beautifully worked release bar.  The item is marked with the makers mark: a reverge "G" and conjoined "B".  The leather case is marked with the GB on either side of what looks like a beehive.  American in origin c.1780-1800.  An identical piece can be found on theOld Sturbridge Village website.