Britain did not convert to the Gregorian calendar until 1751, when 11 days had to be added to their dates to get the Gregorian dates. In 1639 they were 10 days behind the Gregorian calendar.
Re: Klein Tools Or Greenlee. Both Klein and Greenlee are TOP quality tools with a niche market. They have a few common tools (such as rabis and ratchet cutters) and either is worth buying over pretty much anything else. They are not really direct competitors. I prefer Knipex for most hand tools except linemans.
Mac Tools is a professional tool company located in Westerville, Ohio, USA. The Mac Tools line consists of over 8000 professional tools including screwdrivers, ratchets, wrenches, and assorted air tools. Mac Tools also makes its own tool boxes located in its manufacturing plant in Georgetown, Ohio. In the automotive repair industry, Mac Tools is considered a top tier tool.