I have a mint Nikkor-W 300mm f5.6 lens that has a red "D" inscribed on the barrel about 1/2" from the serial number. It appears it was put there by the factory as it is incised with the same quality and is inline with the lettering. Does anyone know what the red "D" means?
Thanks,
Thomas
Here's what it looks like: 7th picture down from the top: (Click to enlarge).
http://blog-imgs-85.fc2.com/k/e/n/ke...7160543428.jpg
Thomas
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