Anyone have an idea when these were made? Must be 1940's-ish, no? They're for sale http://www.ebay.com/itm/3-Early-K-D-Ratchet-Wrenches-22-23-24-Patent-Applied-For-/152276179502?hash=item23745e1a2e:g:lYYAAOSw-CpX~Zxx
