Pretty cool device, unsure of working or not, but mancave appropriate:
http://www.ebay.com/itm/Vintage-Bos...1282909178&pt=Motors_Automotive_Tools&vxp=mtr
NMNA
http://www.ebay.com/itm/Vintage-Bos...1282909178&pt=Motors_Automotive_Tools&vxp=mtr
NMNA