I was thinking of this the other day, and would like your thoughts on this. Sorry it's kinda long.
There are six 2c Orange first issue revenues: R6, R8, R10, R12, R14, and R15. As listed in Scott, only two of these reportedly have a partial perf. variety: the R6b (Bank Check) and the R10b (Express)
According to the Boston Book, partially perforated stamps (as well as the imperforate ones) were released early without going through the perforation process in order to keep up with the extreme demand.
Originally the 2c stamps were to be yellow, but it decided in early October 1862 to switch the color to blue because the yellow stamps were less than impressive.
The Boston Book says:
Quote:
The date upon which orders were given to change the color of the two cent stamps from a yellow to a blue was, to the best of our belief, Oct. 10, 1862. From that time until August 1864, all two cent stamps were printed in blue.
What is unclear from the Boston Book, were there any of the "yellow" versions released to the public in 1862? This is important because only those stamps released in 1862 would have a chance of having a partial perforate variety.
Scanning over the current listings in
ebay and Hipstamp, finding a pre-1864 date on any 2c orange stamps is almost impossible. I personally have a 2c Certificate (R8c) dated December 3, 1862. So I do know there are some out there.

There are no known imperforate varities of any of 2c orange stamps. Of the two (R6b & R10b) partial perforated stamps listed by scott, there are no pairs known of either, according the Curtis Census. There is also none listed at the Philatelic Foundation.
There is only one genuine R6b and one genuine R10b listed in the PF. Both are questionable in my opinion.
With a Scott catalog value of $60, the R6b would seem to be the most common of the two, although finding a convincing copy is very difficult. Dan has one of the best convincing copies that I have seen on his website (
https://revenue-collector.com/pages/2888.html).
Another was sold at the Matthew Bennett International, Mar 2012, Sale 344, Lot 4831 (
http://www.usphila.com/us/stamp/pri...tt-r6-page-1)

It even has a 1862 date which would further support that there was some "yellow" stamps released to the public.
Its much harder to find a convincing R10b. Again Dan has a descent possibility on his website (
https://revenue-collector.com/pages/2241.html, but as Dan has pointed out on another post how easy it would be to trim a perforated stamp with very large margins.
The fact that no pairs exist is problematic.
If the partial perf. stamps do exists, there can't be too many available. They are definitely far undervalued in Scott. I've been looking for convincing examples of both of these stamps for a couple of years now. Haven't found any.
If anyone has a convincing R6b or R10b, please post it, especially if you have a certificate for one.
So do they exists?