(!!) (Best Value Used) ECC81=12AT7 Siemens Halske Germany “”D”” getter 1960 era used/good (8.8/7.5ma) Title: 12AT7 Siemens

1 low noise tube) ECC81=12AT7 Siemens Halske Germany “”D”” getter 1960 era used/good – date code on bottom of tube

1 section) 8.8ma Gm=4600

1 section) 7.5ma Gm=4300

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