So far I have 18 observations, but I'll wait to post, because of these issues...

Clockwork:X

Do you mean depth?

Theme:XX

How do I determine this?

Which Slot you use: Left, Top-Left, Top-Right, Right

Some casinos have four slot machines in a row.

As far as I can tell just play it and look at what whizzes by on the prize wheel. If it's consumables of any kind it's a consumable machine. Hearts are a heart machine. Kleptolisks are a double or nothing machine. If you only see crowns it's a crown machine (however I might be wrong and there might not be an only crown machine, time will tell)

Tier: 3
Clockwork: Wasteworks
Theme: Slimeway
Which Slot you use: All 4
Amount of Spins: 40 (10 coins per slot)

I kinda wanted to post all my data from each machine as I determined what machine was what. Klepto machine is evil and I hate it. XD

Bottom left (cr + vials)
50 x3
50 x2
50 x4
50 x6
50 x2
50 x8
50 x2
50 x4
50 x2
50 x2
Total: 1750 cr

Top Left (cr + health)
Heart x2
50 x8
50 x6
50 x2
Heart x2
Heart x1
50 x6
50 x2
Heart x2
50 x20
Total: 2200 cr

Top Right (all cr)
50 x2
50 x14
50 x3
50 x2
50 x3
50 x3
50 x2
50 x3
50 x3
50 x2
Total: 1850 cr

Bottom Right (klepto)
50 x8
Klepto
Klepto
50 x8
Klepto
Klepto
Klepto
50 x8
50 x8
Klepto
Total: 1600 cr

Grand Total: 7400 cr

Long post is long.

EDIT: Just found one casino with 5 machines.

XD You're welcome. Dividing my cr prize by 40 coins input puts me at around 185 cr back per coin. It certainly wasn't profitable during those spins! |D

And some more results for you!
Tier: 3
Clockwork: Wasteworks
Theme: Slimeway
Which Slot you use: Cr only slot, Klepto slot (I didn't move from last test results)
Amount of Spins: 94 (divided by 2; 47 per machine)

Time to see if cr only is most profitable or if the double or nothing is in this test. :3

Assume all numbers unless noted are 50 x #.
Top Right (all cr)
4, 6, 2, 3, 3, 4, 3, 2, 2, 3, 10, 2, 5, 8, 2, 4, 2, 2, 2, 2, 2, 6, 6, 2, 8, 2, 3, 2, 3, 2, 2, 2, 3, 2, 2, 2, 8, 3, 2, 2, 2, 2, 2, 2, 3, 3, 3
Total: 152 x 50 = 7,600 cr

K = klepto
Bottom Right (klepto)
K, K, 8, K, K, K, K, K, 8, K, K, 8, K, K, 8, 8, K, 8, K, K, K, K, 8, K, K, K, 8, K, 8, 8, 8, K, 8, 8, 8, K, K, 8, K, K, 8, 8, 8, K, 8, 8, K
Total: 160 x 50 = 8,000 cr

Grand Total: 15,600 cr

And I was convinced the klepto wheel was evil. cx At least it was kinda nice this time!

A friend of mine got this high prize and asked me to post. cx

There's no unique armor/weapons/costumes or accessories as a reward? If there aren't any then I seriously hope they add them!

It makes sense that at a casino you would win money, but it would make more sense if you won a different type of token, which could then be exchanged back for special items instead.

I've seen a coin toss aura prize, which creates a temporary effect of a coin bouncing above you. Not permanent, sadly.

Number of coins: 420
Money spent: 84.000 Cr
Money earned: 80.250 Cr
Total loss: -3.750 Cr