Norway 1882-93 10-O (Ring Unshaded Sans Serif) - Double Impression?

Good Morning,

I have some Norway 1882-93 10o (ring unshaded sans serif) stamps scanned below. I took some scans of similar stamps so I could get a comparison / consensus on whether or not these stamps may have double impressions and for general identification.

Please have a look and give me your opinion of these stamps.

"10o - 05" does not have a dot / period after Postfrim.

Scott #40 A8 10o rose 80 2
a. 10o rose red 80 2
b. 10o carmine '91 80 2
c. As "b,"imperf. '91 3,000 2,750

10o - 01

10o - 02

10o - 03

10o - 04 - Double impression?

10o - 05 - Double impression? No period after Postfrim


Thank you for looking

I would say over-inking, instead of double-impression.

Thank you Partime - I believe that would be the better description.