My photo-skills are not very good, sorry. It's really more greyish and on some parts its mirror or chrome-like. I joined some more picture. It appears on all 122P224 I have. Always on the same parts of the tube : on the bottom part and along the wires. The thing is, that some nixies are from Sphere, sold as used and some from eBay, supposed to be NOS... They all look the same!
<https://lh3.googleusercontent.com/-XhK_qmj7wv8/VuMEj7ndfmI/AAAAAAAAAmc/aaFxxe69nxoUleHVTbDenbur_IkqugxTQ/s1600/IMG_0011.jpg> <https://lh3.googleusercontent.com/-0XBUu2g6KT0/VuMEg4pkfvI/AAAAAAAAAmY/WADxYsWkUA8neZfy4jIv45lOCWuJhx1qQ/s1600/IMG_0010.jpg> <https://lh3.googleusercontent.com/-ErYG9sBers8/VuMEc9qvlyI/AAAAAAAAAmU/uqGZWFHhSO0_nT-0y0R2kH8CNpKulNYFA/s1600/IMG_0009.jpg> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/56e49978-be07-4f39-b4ee-c6a4adbad1cb%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.