Excellent condition Mamiya auto mamiya sekor 50mm f2, late model

For sale as I am organizing my collection.
It has been stored in a dehumidified cabinet.
This lens has an M42 screw mount, but I am listing it under the Nikon F mount category because there is no category for M42.

It is rumored to be made by Tomioka Optical and is a popular lens that produces very sharp images.

[Appearance]

There are some scratches and dirt from use, but it is in clean condition without any major damage. Please refer to the images.

[Optics]

It is a clear and beautiful lens with high transparency when viewed normally.
When held up to a strong light like an LED, there is a slight haze on the rear element. I believe this will not affect the photography.
There is no sign of mold. There is no oil on the aperture blades.

[Operation]

The aperture operates normally.
The helicoid also operates smoothly with moderate torque.

[Included Items]
None
※ Although a rear cap is shown in the image, it is not included.

※ Please read my profile before purchasing.
※ Since this is an inspection by an amateur, there may be some defects that I have not noticed.
I will respond to any questions, so please feel free to ask.

[Important]
If you wish to negotiate the price, please be sure to include your desired price. Also, if we cannot agree on a price and you are unable to purchase the item, please be sure to reply.
I am having trouble with many frivolous price negotiations, so if you do not follow these instructions, you may be blocked.