MC Rokkor - PF 1:1.7 f=55mm

We know one version of the 55mm 1.7 MC-Rokkor:

The first version is based on the typical MC-Rokkor style with the aperture ring in rear position. The aperture number can be seen in a viewfinder with aperture-read-in function. It is the last 55mm standard lens. The later MC-Rokkor standards will show 50mm except the very fast 58mm 1:1.2. By ecenomical reason, the lens lacks of a DOF-function.
This model was sold extremely often and can very easily.

MC Rokkor - PF 1:1.7 f=55mm Version 1
Focal length: 55mm fixed
Aperture range: 1 : 1.7 - 16
Aperture type: Automatic iris, 6 blades matte.
Optical design: 6 elements / 5 groups
Detailed optical design, front to mount: 3 elements / separate
- aperture -
3 elements / 2 groups.
Close-up distance: 0.55m
Filter size: 52mm fixed
Shade type: Screw-in type
Length from mount plane, focus at infinity / close-up: 38mm / 45mm
Diameter: 62mm
Weight: 233g
Lens coating: Single coating, yellow-purple-blue complementary.
DOF type: No DOF function.
Supported aperture functions: Stopdown metering: Yes.
Automatic diaphragm: Yes.
Meter-coupled TTL: Yes.
Aperture read-in: Yes.
Supported camera modes: M, manual: Yes.
A mode: Yes.
S mode: No.
Program mode: No.
Front view:

Polished silver front.
Rear view:

Silver ring on black mount.