Such a weird lens: Mir-1B 37mm F2.8 (with K-1): Pentax SLR Talk Forum: Digital Photography Review
Mir-1 (Mir-1A, Mir-1B, Mir 1V) 37mm F2.8 Lens Reviews - Russian and Zenitar Lenses - Pentax Lens Review Database
Russian White A Semi-Wide Angle Lens Mir-1 37mm F2.8 Is the Exceptional Among Copy Lenses, Especially Its User-Friendliness - Wabi Sabi Tokyo with Old Lenses. Hidekatsu Street Photo
Mir 1B 37mm f2.8 Review - Russian Lens - en.fotografmania.com
37mm Mir 1-B | Vintage Soviet Lens — Keith Nickoson
Using a MIR-1 37mm f2.8 Lens on M42, need help! info in comments : r/VintageLenses
MIR-1 37mm f/2.8 lens , from 1954 to 2015 – Using old lens | Nigel Borrington
Mir-1 (Mir-1A, Mir-1B, Mir 1V) 37mm F2.8 Lens Reviews - Russian and Zenitar Lenses - Pentax Lens Review Database
Everything You Need to Know About Mir-1 37mm F/2.8 - Iron Glass
MIR-1 37mm f/2.8 M39 SLR for Zenith-3, -C - uralseller.com
Mir-1 Grand Prix Brussels 1958 37mm f/2.8 M39 2.8/37 SLR lens | eBay