I believe these were made by Johnson. Can't find any info on them except some old info on a used one sold by Folk of the Wood some time back for around $750. It comes with a nice hard case. The tuners are Gotohs, the fretboard appears to be rosewood. This is a round neck and it is pretty loud. Nice deep tone. There is some slight discoloration where the plating is coming off (looks like wear). Remember, this is not a National, it's an import and priced accordingly. Nut width is 1 and 11/16.
Pics here:
http://www.mandobar.com/sterling.htm
I am asking $600 with shipping to lower 48 states UPS ground. Please no trades (trying to scale back). Payment via US Postal Money order or Bank Cashiers check only. Please e-mail me with any questions: myanocsk AT ix dot netcom dot com