Here is a matched pair of 7316, made in Holland, highly desirable 12AU7 equivalent with halo getters. These tubes test excellent on my calibrated Hickok 533A with no shorts:
tube 1: 2175/2175
tube 2: 2225/2300
where 2200 is considered new.
Date codes are Ct2 delta9K and Ct3 delta9G. One is branded Philips Miniwatt, the other is branded Amperex SQ.
Fantastic sounding tubes. I used these in my Cary CDP with great success. One of the most desirable 12AU7 equivalents, and far and away rated as the best sounding variant at tubeworld; super liquid, gorgeous midrange, extended, etc.
Buy with confidence from a long standing audiogon member, and feel free to ask questions. Thanks for looking!