"Dip-at-toe" stubtails 18th century

[Fikira]

Hi,

In the article "Old Sheffield razors" , written by Henry T. Lummus, we can read this statement (p. 263):



Like this (Razors A (1780) & B (1790)):



In this specific club, I'd like to gather razors which has such a dip in the spine at the toe,
a "dip-at-toe" and confirm or contradict the statement that such razors are from 1760 - 1790

All pics of such razor are welcome, and razors which can be dated even more!

Regards