M39 Screw Mount SLR Lens to Micro Four Thirds (MFT, M4/3) Mount Mirrorless Camera Body Adapter – Fotodiox, Inc. USA
Amazon.com : Fotodiox Lens Mount Adapter, M39 (39mm x1, Thread Leica Screw Mount) Lens to Leica M Adapter with 50mm/75mm Frame Line, fits Leica M-Monochrome, M8.2, M9, M9-P, M10 and Ricoh GXR
Amazon.com : Fotasy Leica M39 Lens to Canon EF-M Mount Adapter, L39 39mm LTM Lense EFM EOS M Adapter, Compatible with Canon EF M Mount Mirrorless Cameras EOS M M1 M2 M3
Amazon.com : Fotasy Copper Adjustable Leica M39 Lens to E Mount Adapter, LTM 39mm FE Mount, Compatible with Sony a7 a7R a7s II III IV a9 a7c Alpha 1 a6600 a6500 a6400
Urth Manual Lens Mount Adapter for M39-Mount Lens to ULMA-M39-L
Lens Adapter - M39 Mount Screw Lens to Leica M RF Camera - 50/75 – Fotodiox, Inc. USA
Bellows Adapter M39 Thread to Leica M Lenses (LEI-M) | Novoflex
L39 Leica Visoflex Lens to Hasselblad V-Mount Cameras - Pro Lens Adapter – Fotodiox, Inc. USA
Tokyo Kogaku State 50mm f/3.5 Leica M39 Mount GOOD - Seawood Photo
M39 Lenses
M39 lens mount - Wikipedia
Fotga Adapter Ring For Leica M39 L39 Mount Lens To Nikon 1 Mount Mirrorless Camera N1 J1 J2 J3 J4 V1 V2 V3 S1 S2 Aw1 - Lens Adapter - AliExpress
Chroma Cameras unveils new 24mm lens for Leica M39 screw mount that weighs only 16g: Digital Photography Review
Amazon.com : Fotasy Leica M39 Lens to Canon EOS RF Mount Adapter, Adjustable, M39 EOS R Adapter, 39mm LTM Lens Adapter, Compatible with Canon EOS R Mirrorless Camera EOS R RP Ra