Vintage Lufkin and Brown and Sharpe Inside Mic Sets.

I have a Lufkin # 680 B Inside Micrometer Set. It is complete and very nice. As far as i can tell from 1940's. $45.00 shipped. I also have a Brown and Sharpe # 260? Inside Micrometer Set. Also very nice and very complete. This may be from the thirties. I can't locate this set in my catalogs. Also $45.00 shipped. These need a new home instead of in a drawer in my machine shop.