Cryselco (Philips) 80w BC fluorescent tube

I found this gem in my local lamp bin today - although I've had quite a lot of luck with lamp bins in the past, I hadn't managed to find any BC tubes in any until now. This is only the second such tube in my collection, the first being an Osram-GEC with different style BC caps. 1980 seems quite late for one of these tubes, this must have been among the last produced by Philips.