Year for Gillette Bostonian "made in England"

[Laurent Chauvin]

Hi all,
I just bought a Gillette Bostonian "made ​​in England"
I would like to know what year it is.
Here are the codes that are engraved on it:
on the handle:
pat.133963.1917-
under the head:
140410Y-

Thank you for your knowledge.
Sorry for my English.