Is This A Pen Cancellation?

Any infos please

It would appear so from the ends of many lines curving back.
The clerk would seem to have had a lot of time on his (or her) hands to draw an MS cancel so similar to graph paper.

It must have been a slow day at the post office.

I've seen a couple other similar to very-similar manuscript cancellations recently which I thought I might throw in here even though they are US and do not approach the meticulous graph-paper like work shown in the original post.

These are vendor offerings, not mine: US Scott #1 and #73:

One was even listed with the comment that the postal clerk clearly had too much time on his hands. Might this graph paper impulse have been a widespread global experience among clerks trapped at work waiting for an influx back when there was, relatively speaking, not a lot of mail....

I just cannot resist adding to this old thread of cross hatch MS cancels lot 15 from the October 2021 Eubanks sale. It realized $15,000.
Now this postal clerk was really killing time.
But clearly, manuscript cross hatch cancels were a thing back in the day.

I can hear the bored clerk now "let's see 'em wash this cancel off to reuse it..."

Somewhere out there, someone has to have a stamp with a Tic Tac Toe game on it.

Or
Clerk who just got his butt chewed for poor cancels and the need to make sure stamps don't get reused thinks; "Ok, fine! They want to pay me to make sure that their revenue is protected…"
Don

Rather than 'graph paper' cancels, they appear to be a bunch of X's --- kitty-corner lines, rather than vertical/horizontal lines. If I really wanted to cancel something out, I would do a series of parallel slanted lines one way, then the other way, resulting in what you see on these stamps. But yeah. Some postal clerks had a lot of time on their hands!

Looks like pen, and looks like it was made to look like one of these:
http://www.marcophilie.org/x/x-gri-i.html