|
Rare vintage Ratcliffe's patent spring calculating slide rule,computer Rochdale $69.05 USD Sold on: 2014-Jan-05 Marketplace: eBay  5 Treasure 0 Trash   100% Detail:In its original box is this English "Ratcliffe's Spring Calculating Slide Rule" produced by J.S.Ratcliffe, Crawford Spring Works, Rochdale England. It would have been used in the spring making industr...  More Relevance Historical Items |
|
|