The flower is a 300 dpi scan. the detail is taken from that same scan.
On the left side you can see frame overlapping due to sticky rewind button.

http://www.ussrphoto.com/UserContent/2232012_chaika industar-50 04.jpg

http://www.ussrphoto.com/UserContent/2232012_chaika industar-50 04 detail.jpg