Help identifying a Svetlana Winged C

Kuras

I purchased a Deluxe Reverb 7 years ago. It came with a pair of 6L6's that I promptly replaced with 6V6's. I put the 6l6's in the cupboard, storing them until now. I took my box of old valves round a friends house and he cheerfully told me that they were a pair of Winged Cs which are desirable and will be worth a bit second hand. Could anymore help me identify them in terms of their age? It seems like the Svetlana logo/font changed over the years and that some eras are more expensive than others?



Cheers

impmann

If the Svetlana factory are the same as everyone else, based on that date code its a 2009 valve made in the 37th week.