This is a mirror-image matched pair of red tip (line stage/amplifier input grade)NOS Telefunken 12AU7/ECC82 vacuum tubes. These have Identical internal construction & "" molded in the glass. Please email ME or visit the Vintage Tube Services website if you have questions about the "red tip grade" and what this means. I purchased this pair over 15 years ago from Andy at Vintage Tube Services and have stored them securely; they are NOS; ZERO usage time whatsoever. The chalky white lettering is very fragile on NOS Telefunkens and while this pair both have pretty good white Telefunken logos intact; the 12AU7 designations have some smearing and one tube is missing its date code. See photos. Condition is 7/10 for the printing smudge alone; electrically/functionally both tubes would be a perfect 10. On my calibrated Hickock Cardmatic these of course still test NOS, at 97/96 and 96/96. Currently, Andy charges just under $200 for a mirror-matched pair of Telefunkens exactly like these. I prefer PayPal and do not charge extra for payments made to me via PayPal; I will also take a personal check but it must clear before tubes will ship. Shipment is USPS Priority Mail INSURED. Shipping to USA and Canada. I pack securely. Thanks!