It is traditionally believed that the giving of a knife as a gift to a friend will cut or sever the relationship. To avoid such ill luck, the recipient should give a coin in return so as to "pay" for the gift. It is common to include a coin with the knife as a gift which the recipient is to return as "payment".
Blackbird's gnomes have just released this "old timey" pocket knife for your whittling needs. It features a single blade with locking mechanism, a white bone handle and a $1 Sacajawea coin all packaged in a Field House branded canvas bag with a card explaining the superstitious terms for gifting a blade.
The Field House - Bone Handled Pocket Knife