Figured I would dust off one of my Vacumatic pens today so I could share a pic. It's got a gold EF nib and is currently inked with Quink Black. The color is "Golden Pearl," my favorite of the stacked celluloid color options. It's date code is "7" which could mean '37 or '47.
These pens are mesmerizing in person when you rotate them in nice lighting.
Thanks. I knew I had to get one eventually after I saw one in person.