Tested and working: Olympus Pen EE-3 + Genuine Olympus PS-100G Flash (O12)

This camera is a half-size camera released in May 1973, which added a flashmatic mechanism to the Olympus Pen EE-2.

The flashmatic mechanism, when using a strobe with a guide number of 14 at ASA 100, sets the appropriate aperture value if the estimated distance is set on the manual aperture ring. This mechanism specifies a film sensitivity of ASA 80-125, so you need to adjust the aperture ring when using films of other sensitivities. Also, the exposure meter works as an auxiliary even when using the flashmatic mechanism, and it seems to stop down the aperture a little more than the aperture value corresponding to the GN when used in a bright place. I think it's a function to avoid excessive overexposure.

Operation is good.
The body is generally lightly soiled.
There is a slight color change on the film guide rail, but it does not particularly affect the operation.

The exposure meter, shutter, and aperture are all normal. However, the accuracy of the exposure meter has not been very accurate since it was new due to its construction.
The manual aperture corresponding to GN14 used for flash photography stops down as per the GN in dark places. In bright places, it has a function to stop down more than the standard.

The body's light-shielding felt has been replaced, but it's a DIY job.

Some dust can be seen in the viewfinder, but it is generally good.
The lens is generally clear.

The strobe is an Olympus PS100G, which has a GN of 14 at ASA 100.
The power supply is two AA batteries or a 100V household power supply via the included AC cord.
The strobe that was released at the same time as this model and is advertised as being for the EE-3 only is the PS-200, but both have the same GN, so there is no problem using either.

The soft case is a general-purpose product, but it is new.

The lens cap and strap are genuine Pen products.

The strobe's instruction manual, case, and AC cord are included, but the AA batteries are not included.

Other features... Half-size camera, operation confirmed.