Briggs & Stratton 18hp V Twin Model #422707 Type 1236.02 Oil Filter

This sounds silly but I can not find the oil filter on this engine. Does anyone know where it's located? Could this have NO filter? I doubt it. The oil drain pipe is right out in the open but can't see a oil filter anywhere.

Thanks. I have looked all over the engine and no filter. Did a little research online as well and found a site that actually mentioned there are older situations/engines that have no filter. They work on a splash system. As I have no history on the engine I have no idea ho old it is actually. Any info you could provide in this category would be greatly appreciated.
 
There is a Date of Mfg Code of what looks like #0743 on rear of riding mower but it makes no sense.

So it looks like     Nov, 3rd  1992   using the above chart....