Fonts - Figuring out what a font is
To find out what a particular font is, go to www.WhatFontIs.com

Browse to your jpg file showing 4 characters of the unknown font.
If necessary, use Xara, PS, Corel, etc. to crop-out letters.
If necessary, combine using Windows Snipping Tool, Xara, PS, Corel, etc.
Once again use Xara, PS, Corel, etc. to ready this jpg you will upload to WhatFontIsThis.com

GL !!