The coin-op 25/40x100 uses the same straight-through 25x/40x turrets as 25/40x100 standard. But, two features differentiate it from the other ones of 100mm family:

1) It is pier-mounted, and meant to be mounted permanently in the public places like parks with splendid views. In fact, if you come to China, you can see it in almost every major parks and scenic spots. 

2) It has an anti-theft coin-op box for commercial use. But, if some users just want to have it permanently mounted outdoor for their own use, the coin-op mechanism can be disabled.

It is heavy, the total gross weight of the whole package is 101 kilograms! But, they still look wonderful, a "beautiful monster" as commented by the users.