M37-M42 M37 x 0.75 Female to 42mm x 1 Male Screw Camera Lens adapter - AliExpress Consumer Electronics
1.5-26mm Adjustable Iris Diaphragm M30 to M37 Camera Lens Module Adapter Ring | eBay
RARE] Asahi Pentax Takumar 83mm F/1.9 for M37 Mount w/ M42 Adapter from Japan | eBay
AsahiFlex to Sony E-mount Adapter - Sony Addict
M37-M42 Mount Adapter (KJAFDSXNR) by Ryo_MROpt
Ø2" Adapters for Unmounted Optics
Adjustable Aperture 1.5-26mm Iris Diaphragm M30 To M37 Camera Lens Module Diy Retrofit Adapter Ring - Microscope Parts & Accessories - AliExpress
Amazon.com : M42-FD Lens Adapter, M42-FD M42 Screw Lens for Canon FD F-1 A-1 T60 FTB Film Camera Adapter, for Zeiss, for Pentax, for Praktica, for Mamiya, for Zenit : Electronics
Macro Accessories - Asahi Pentax M37 and M42 lenses and accessories
M37-M42 M37 x 0.75 Female to 42mm x 1 Male Screw Camera Lens adapter - AliExpress Consumer Electronics
M37 to M42 37mm 42mm (Asahiflex Lens to M42 Lens) adapter Ring 729436248441 | eBay
For Sale - Sold Genuine vintage Asahi Pentax M37-M42 converter ring with original box - PentaxForums.com
M37 adapters|RafCamera Store
M37-M42 Mount Adapter (KJAFDSXNR) by Ryo_MROpt
M37 to M42 37mm 42mm (Asahiflex Lens to M42 Lens) adapter Ring 729436248441 | eBay
Leica X Vario Attached to Telescope
M 37 lens to M 42 body adapter?? - PentaxForums.com
M37-M42 M37 x 0.75 Female to 42mm x 1 Male Screw Camera Lens adapter - AliExpress Consumer Electronics
Asahi Pentax Takumar 83mm F/1.9 Lens for M37 Mount w/ M42 Adapter from Japan (C1749) | Big Fish J-Camera (Big Fish J-Shop)