I have an 80 pfenning reichpost stamp of the german empire which seems to have darker and fatter lettering. Is this common on this stamp? I researched images online but couldn't find one which resembles this stamp. Here is a photo of the stamp next to the 25 pfenning stamp of the same series.

Here is a close up of the writing on my stamp:

Here is a photo of the stamp from the internet:

Does it look like the "s" is crooked?

Thanks for looking.