604 8c Coil Stamp Curved Ink Hairline Drag Across 3 Stamps

Thin blue ink line starting at upper left edge of 2nd stamp going down and across 3rd stamp at Queen's chin level and then turning upward and exiting at the top of the 4th stamp. Refer to detail image.

Honest opinion. Insignificant, adds no extra value.

Hello bwdavis and finches

Nice stamps and I appreciate you passing on what you've found on these stamps and others. I enjoy this aspect of stamp collecting and to me it doesn't really matter if it's worth a fortune or not. It's interesting.
Having said that...I'm wondering why some stamps are worth more than others due to "stroke on teepee" "dot above arm" and such...and others are not.

Idaclare,
stamps with noticeable flaws are worth more than others because some collectors prefer these 'by chance' printed flaws but unfortunately a misconception exists implying collectors will pay large amounts for flaws, well that's absolutely wrong, average limit is 20-30% above mint for 'common' flaws.

I'm not referring to the limitless supply of misperfs, abundant in US modern coils as shown in Ebays 'Errors, Freaks and Oddities'. Theres just too many Values/Issues to be mechanical-electronic malfunction - only suspicion is continued human intervention.

The fun of "flyspecking" and the hope to get a LITTLE more out of the stamp in price and advertising.

Bwdavis, you certainly have good eyes, and apologies if my first answer sounded rude or abrupt, wasn't meant that way.

Keep up the good work looking for markings.