Praktica FX2 open. A camera made to last.
The last model before adding pentaprism to make the IV version
The lens is a preset that automatically closes as one starts to squeeze the release button. This makes the first "pop". As one continues to squeeze, there is another "pop". This is the mirror moving up. One must continue to press in order to get the final "pop", which is the shutter moving. I got caught a few times failing to press far enough for the third "pop".