Imperf Or Imperf Coil . ?

..Question.for.the.Guild..
How do I distinguish an imperf
from an imperf coil or are all
imperfs also coiled ??
...Please.Advise...

What you have may be examples of coils made from full sheets, but not "yet" having been fed into the machine the perfs them.

I don't see why an imperf strip could not be considered a coil strip if the means of separation was a knife cutter as opposed to perforations. The thing is that you can't call it a coil based solely upon intent.

Those appear to be imperf coils, listed in the Scott Specialized. There are certainly a number of imperf coils.

Imperforate flat plate coil stamps (-H and -V) are Scott listed in their own section.

Such were hand made with paste-up pairs. Also this was the stock sold for private perf companies.

(I started writing this while others were also replying. Apologies for the redundancy).

Seeing the quantity of equally cut strips, it is likely that those are "imperforate flat plate coil stamps" as listed by Scott (e.g. 343V or 409H) but they are very hard to identify. These were regular flat plate sheet stamps, sliced into ribbons 10 or 20 stamps long, manually pasted together end-to-end, and distributed by the post office in coil rolls of 500 or 1000 to stamp vending machine companies.

(picture from the internet)

As you probably read, Scott Specialized says "Imperforate coil stamps are often difficult or impossible to differentiate from sheet stamps, but many can be authenticated, especially as pairs or strips, and some bear authentication marks of contemporaneous experts."

Are there any paste-up pairs included in the batch? Any with said experts marks on the reverse? Do the stamps have the recognizable "curl" of coil stamps from the period?

I believe the way to identify them is by magnification of the cut edge to see how they were cut, e.g. not with scissors, a paper cutter, or a razor blade etc. Also the paper fibers on the edges need to be appropriately aged 100+ years, not "freshly cut" from a mint sheet even like 40 years ago.

They have a bit of a premium over the corresponding sheet stamps, but except for the early ones, barely enough of a premium to justify the cost of a certificate.

all appear to be imperf COILS...I see no paste UP pairs.....

Sheet stamps almost never have parallel edges, imperf coils always do. They are not all that difficult to differentiate.