This is an earlier version with 8 aperture blades rather than 6.
KMZ made Helios 44m 58mm f2 with Sony adapter and Hoya Skylight 1b M42 mount
SERVICED & TESTED Helios-44 58mm f2 M42 Mount | s/n N0424072 | EXCELLENT | PWO
Helios-44M 58mm F2 M42 Lens USSR Swirly Bokeh Very Good Excellent Condition
Helios 44M 58mm f2 M42 Mount Manual Focus Prime Lens Bokeh USSR Vintage Russian
Helios 44M 58mm F2 M42 Screw Mount Lens VERY CLEAN GLASS aperture clean
TESTED (KMZ) Helios-44M 58mm f2 M42 Mount | CLEAN | s/n 8032201 | SUPERB GLASS
