Picture above is from Item 638  for reference. Tubes are similar to item 638 except that these would show light use.

Single Tube RARE Lightly used, Like New 1953-56 Brimar CV1985 6SL7GTY Tubes. Square Getter and Brown Micanol Base. STC Footscray production. In generic white boxes from bulk. Cosmetic condition is quite good considering the bulk storage.There are two small variations in the Micanol base color as shown in the picture, Reddish Brown and Golden Brown. One of the most desirable 6SL7 type tubes. This particular tube has a thin transparent film on glass that wont come off. Cosmetic Defect Only. Tube works fine.

NOTES:

1. In this lot, often some tubes have same month/year code with different shade of the base. Pairs are matched with the closest date code, base color and test scores.
2. Some tubes have white painted stamp of April 1964 apparently used to date stock by third party. That is not the year of production of the tubes.
   

Tested and matched on Top of the Line Calibrated Hickok 580 Lab Grade Tester recently calibrated by late Chris Haedt. 65% = 1000 mmhos on this tester for 6SL7. Most tubes test between 1800-2100 mmhos, pretty close to the New test scores.

Test Scores: 1875-2100 mmhos.

Single Tube = $45.

• Brimar CV1985 6SL7GTY - Single Tube RARE Like New 1953-56 SQ Getter Brown Micanol Base - STC Footscray Prod.