Quoted from Dr_of_Style:

Hi
Don't have that pin, but if you look at the bottom board, there may be a switch mounted to it, with a peg extending down from it.
Tapping on the bottom, makes the peg jump up, and open that switch.
If that's your case too, its made to work that way.

Quoted from Frax:

Pretty common feature on earlier games.
Just want to say that QoD is an excellent game too. Awesome nudgefest.

Quoted from Frax:

What, really? What's not to like aside from triple gobble holes? LOL. Even my wife liked it when we played a restored one at Texas Pinball Festival 2015. Just tons of fun to try and shoot all those targets without sinking the ball.
I'd totally stop by and have a QoD throwdown next time we end up in Louisville...we have family there.

Quoted from Pinballprowess:

Aaaah, now THAT'S what I like to hear... young people that are 'into' the EM's. Very important (at least to me). I would like to see these great games that I love so much... live on and be enjoyed by future generations to come.

Quoted from Dr_of_Style:

very rare indeed! my wish too, is that younger folks get into EM machines, pins, and arcades!
some very cool history there that can't be seen when your whole day is stuck in that damn phone...

Quoted from RacingPin:

Pinball-dood,
Those machines never had true on/off switches. Easiest solution if you don't want to kick it is to put it on a switchable power strip. You could also rig up a short extension cord and an inline switch. However if you want to add an actual switch I'd recommend changing out the power cord at that time and putting in one with a ground.
Mike V

Quoted from CrazyLevi:

Cool game, though I do prefer the art of the 1960 version World Beauties.

Quoted from Otaku:

Yes, they used it into the mid-60's. Lots of people just reach into and tap the weight on the switch to turn them off. Be careful though, I forget if that switch is live with 120 volts or just 30 (volts).
I have never been able to do it either the few times that I have tried. Regardless, at this point in time, I would suggest not bashing the bottom of the cabinet anymore.
jrpinball's brother had a North Star at Pinfest he had adjusted just right so that a firm tap with two fingers or so onto the coin door (tilt switch there, I'm guessing?) would shut it off. Yet it never seemed to shut off during normal play, even when nudging. Pretty cool to see.
I don't feel comfortable shutting them off that way though and especially would never let that fly in my house as the only way of shutting machines this old off. A much safer alternative is a real power switch like the later 60's and on machines have, but I still don't even come close to trusting that. It still runs live power constantly through the service/convenience outlet, which runs through a fuse holder, etc., etc., still a lot of voltage going through the machine while you sleep at night. Power strips and light switches on dedicated outlets are what I do. During long vacations even the power strips get unplugged in addition to (obviously) being switched off. Can never be too safe, and it saves time on turning them all on anyways, rather than waste it. Even if it did waste time, the extra 10 second of time spent would probably be worth it.

I'm only 18 yet still crazy as the rest of you.

Quoted from Frax:

We will be going to Texas Pinball Festival... we missed it this year so I could go to Vegas for IFPA Nationals.... I won't be making that mistake twice. We want to go to Louisville Expo at some point though, it's on the list. It's one or the other though...my job sucks a fat one and me getting that much time off in a month basically guarantees I'd have no vacation for the rest of the year. =|

Quoted from jrpinball:

I'm not squeamish about turning off my games by rapping the bottom. If the switch is adjusted properly, just one nice firm rap will do the trick. They were made to take this. If you don't want to though, I would recommend a switched outlet strip rather than hacking in a power switch on a game that never had one.

Quoted from Dr_of_Style:

Yup, thats it. the bottom was left loose and that allows it to flex enuf when you rap on it, to pop that switch open.
There's nuthin to worry about rappin on the bottom of the pin, its the only thing there.
the bottom mech board is suspended above the bottom.
you cud kick the dog s#!t out of the bottom, and really not hurt the pin.
not that I'm recommending that...

Quoted from YeOldPinPlayer:

Pinwiki has a photo of the switch and a short explanation of its use: http://www.pinwiki.com/wiki/index.php?title=EM_Repair#Turning_Machines_On_.2F_Off
Have you upgraded the cord to a grounded cord and added ground braid to the machine? Machines of this era were not grounded. If something goes wrong YOU can be the path to ground and get a shock. Vid has an excellent guide that shows how to upgrade the cord. https://pinside.com/pinball/forum/topic/replacing-line-cords-plugs-wall-sockets-vids-guide#post-1945124
Have you checked the fish paper on the coin door? Your game has 120v running to the coin mechanism. The fish paper is the only thing insulating you from that 120v. http://www.pinwiki.com/wiki/index.php?title=EM_Repair#Safety