Zbone,
with the exception of only one known experimental barbed Hilbre with a HUGE 1.5x4.25" vented blade and about a doz. with white ferrules instead of black on semi barbed heads, the picture shows them all. The big Super Hilbre is 160gr on my scale.
The barbed Hilbres can sometimes be found with a translucent ?rubber-wax coating. Apparently they were dipped to prevent rusting. I had a few of those at one time.
Some Fungi or whatever it is liked to gnaw on the coating though. They look rather disgusting in the uncleaned stage. The uggly layer can be rubbed off (3-o'clock) and those heads that I uncovered were all in perfect shape (4-o'clock).