I was lucky enough to score this mint condition Simpson 260 Series 7 (1981 Vintage) on eBay, for the princely sum of £30. It came complete with the original Simpson outer case and test leads. The meter was in such good condition I doubt it left the case much at all.
Simpson in the USA, have been making the 260 series since 1939, even today it has not really changed in appearance since the Series 1, you can still purchase the meter as a Series 8 for around $300.
There is one issue with the Series 7 , 8 though!