the pilot lamp has burned out on my '59 Bassman RI. i went here: http://www.tubesandmore.com/ and found this: DIAL LAMP, T-3-1/4, 6.3V, .15A BAYONET BASE Long life general replacement lamps for dials, indicators, etc. Replacement for Fender ®. Sold in multiples of 10. If you do not order a multiple of 10, we will adjust your order up to the next multiple of 10. For example, an order of 12 bulbs will be adjusted to 20 bulbs. is this the correct replacement bulb?