Engraving help attribute

[Борис Кон]

Dear Lord , help me to understand dating.
Engraving for sale.
Here's a link to the British Museum:
Engraving dates from 1762 - 1792 year.
As I understand it through a translator, is a reprint of the 19th century , produced by the publisher Marel. Again - are biographical data that publisher.
Why then she engraving dates from the 18th century ?
Or something I did not understand.

Thank you for your participation.