Bought same plates in the same box but exposed way back, 5 for $11 delivered. Cheapest I could find, definitely a set, duh

They have a silvery varnish on top of the emulsion, which is affecting sharpness. Notice how the emulsion has shrunk and the notches which indicate maker of holder, with sliding retaining clips
Hotel Lake by TIN CAN COLLEGE, on Flickr

Boat wave by TIN CAN COLLEGE, on Flickr

Mirror water by TIN CAN COLLEGE, on Flickr