Is there an outside chance that some one would have new(ish)
lamp sockets like these monsters!!!
Terry K

Lamp socket 1 (resized).JPG

Lamp socket 2 (resized).JPG

Lots of issues
I tried all my tricks. Must be careful when bending out(slightly) the center contact!
I have a small wire brush to burnish/clean the sides of the socket.
Of course, the sockets in question are either under things, or in very difficult positions.
The one that is the most aggravating is the #18 bingo card lamp. I believe that
Bally built my whole machine around that socket!!!
I tried to bend up the center contact to get more pressure on the side(s) when
the bulb is turned in.
The sides/diameter seem to be either to large or out of round!
And the fun never ends.
Terry K

"twit",that is exactly the same things I do
On a slightly different note, I noticed that all of my bingo
number lights are/were # 313's!
I tried some # 1464. Wow, the #1464 is a round bulb like a
# 55 lamp. Does it ever fill up the number(s) card nice; a lot
nicer than the # 313's!!!
Terry K

Stoomer, keep in mind that the 1458/1464 are 17V lamps.
The 55's are 6V.
These voltages are relative to their use.
In the bingo card position(s), the lamps are supplied with 17V, so a
55 would burn out! likewise, in all other "general illumination" lamps,
they are supplied with 6V.
# 44 - 6.3V
# 47 - 6.3V
# 55 - 7.0V
# 313 - 28V
# 1464 - 20V
If you dig deeper you will notice different current ratings = brightness.
I like the # 55 lamps for just about everything *, except for the
bingo card lamps where I use # 1464; keeping in mind that my machine is only
on during the times I play it!!!
* the first three odds lamps(Green 4,6 & 8 ) on a Bikini must be # 47 as well as the first Futurity
advance lamp
Terry K

The back glasses that Coos make, according to him,
can handle #55 lamps no prob!
Terry K