I can post post. pict. tonight, no time now but does anyone recognize the name, it is a ring expander. Maybe someone has one of these. I was able to find this under google patents and have a confidential bulletin from Chrylser Corp that describes it.

is this it

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=170653391663+&viewitem=&clk_rvr_id=244429002956

Thanks,
Kirk

Yes that is the one, seems a little later. Thanks for that, here is the original patent, does not appear to have the gauge that the one you show has.