The power switch is marked 1A 250V and would be fine for most tube amplifiers. This is guaranteed to work great for you, though it may need some Deoxit. The terminals have a little vintage solder and wire bits on them. This is a pretty rare potentiometer and would be great on your guitar amp. Please see my pictures for details.
US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.
I have a number of other vintage parts, collectibles, Magic cards, and vintage electronics listed--feel free to take a look! ![](https://rover.ebay.com/roversync/?site=0&stg=1&mpt=1376665199072)