SHOWA rim lock 7680KJ, Unlocking the entrance door

"Lost key, Unlocking the entrance door"

It was declared that there was no door scope, but it had an old type with an integrated intercom.

As for the cylinder, you can see the SHOWA knob and the NX cylinder.It is not clear what the indoor side was like.

I proceeded with normal thumbturn unlocking, but I reviewed it once.After all, it seemed that the tool was about 20 mm short.

It was a KJ type of SHOWA rim lock 7680 series.