These are nice !!!! The fixture in my opinion appears to be much older then the bulb , The fixture is probly from the 1960`s .
If you love these fixtures they should still be plentiful as they saw alot of uses in shelf lighting as well as cove lighting in homes , Cove lighting in homes was a big deal in the 60`s & early 70`s so there should not be any problems finding these gems as people are updating / Remodeling .
The bulb could be from the 80`s or 90`s
Hope this helps , Good Luck !!!!
http://www.ebay.com/itm/4-Foot-light-flourescent-fixture-E-5123-Underwriters-Laboratories-/321009329118
Here they are and at this price they are a STEAL!! ANYWAY can somebody here please date the bulb which is NOT included, that way we can have an idea how old the fixture is.