They are worth a bit of a gamble I won a pair of GEC curved bases earlier in the year which where working equipment pulls the seller was in London and would only do collection only, luckily my brother worked close by I cant remember if it was £60 or £80 the pair but they both tested strongly at NOS levels on my Hickok tester sometimes you just get lucky ;-)
Curved base AND testing strong? Boy, did you strike gold - 2 of the 4 'ex equipment' Osram/GECs I received were curved also...but all 4 were dead or dying! . And another pair was lost in the post/mail - you obviously had MORE than your fair share of luck, methinks!! . Luckily, the supplier didn't quibble at all and is still in fact trying to find some more for me...but 'needle in a haystack' comes to mind. And I suppose I did have my fair share of luck as he let me have an immaculate NOS GEC CV2523 (straight base) for £60...can't complain, lol!!
ps. Don't know if I'm imagining it, but with this tube in situ I swear I'm getting an even more dynamic sound than from its prior 'NOS' tube I got from Italy (both Italians had some of the printing rubbed, and were nowhere near as immaculate-looking......perhaps a result of testing for military use?...mmmm...).
Edited by hypnos1 - 11/10/14 at 8:58am