Hi everybody! inherited
Only after few weeks or so, I guess the light was right, I noticed that the stamp does have something that could be grill.
For moment I was thinking that may be its hinge mark.
The grill is hard to notice.
The definet grill shows up when stamp is wet.
On wet stamp dots can be seen pretty well.
The the thing is that grill on this stamp actually measures 11to14 mm.
And interesting question is, why the vertical perforations is missing.
What do you think, please comment.
Here are the photos