OK, this is a pattern that dates back to the late 19th century when it was featured in English and German cutlery catalogs. It's usually made in a jack knife configuration with two blades opening out of the same end, and usually has two bolsters. The pattern is named for it's shape which is intended to represent, in pocketknife form, a miniature version of another tool. Interestingly, this other tool is no longer commonly found in either England or Germany, but is still commonplace in many American homes. The knife is usually between 3 1/4" and 3 3/4" closed, but can be found in larger or smaller sizes. It's most commonly made with a clip or spear main and a pen secondary.