Watch this
https://www.dropbox.com/s/dq2w6z5r4m...14353.mp4?dl=0
"Chris B" who uploaded that in 2016 gives the following information:
For info printed on the bottom was
BLS114
BS1363A
Total load not to exceed 13A
And a sticker which said 20070725 (Which I suspect is the date of
manufacture).