RTC Mullard Tubes 7308 UK

These came with my Vac preamp.  The previous owner never used them. He already had early 1970's mullards in the preamp already.  I installed them in my vac preamp and tried them for 18 hours.  They sound fantastic!  Typical mullard sound that you are looking for.  Sweet highs, great midrange and nice controlled deep bass.  Here is the description from Brent Jesse's website.
These are the most difficult to find in the 7308/6922 NOS family, and the Mullard military stock has become super rare just this past year. Ultra low noise, matched triode sections, thickly plated gold pins, nice warm sound. Nice Mullard British made 7308 tubes for the French Signal Corps military, with RTC labels (have the Mullard factory code) are very difficult to find in the USA. Made at the Mitchum, UK factory which made tubes for the British military, and a few of these are marked with military CV numbers. SINGLE TUBES, WHEN AVAILABLE, ARE $185.00. CLIENT COMMENTS: "Put the Mullard 7308s into my preamp this AM and wanted to let you know that I LOVE these tubes.  All the clarity of the Amperex tubes they replaced with just the right (slight) amount of extra tone, body and liquidity.  Thank you!