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Do you recommend waiting for my 2MP 1000X 8LED USB Portable Digital Microscope Endoscope Camera to check out better the laid paper of the Russia Stamps (and Romania I believe) ?
That is going to be your own personal preference.
Personally, I have never seen the reason to buy a digital microscope,
Laid paper is easy to distinguish in my experience, perhaps try some lighter fluid.
Perhaps hold the stamp up to a light source (desk lamp) , looking at the rear of the stamp, with your Tongs.
There are collectors that swear by the microscope, let us see how you find it.
If you have problems with Romania stamps, let us know.