I'm sure Henry Vlll's lads didn't have them.

Fresnel Lenses that is.
"The Corporation of Trinity House.
The safety of shipping and the well being of seafarers have been our prime concerns ever since Trinity House was granted a Royal Charter by Henry VIII in 1514"

Latest addition to the collection. I'm wondering why T H It's almost always ≥a year B4 I find the darn things