Its a diesel piston, that hole is there for pulling it out of the block. the rings on the crown are throwing me off. It's either from a very old vehicle or some sort of agricultural equipment.
Grooves on the crown are the ones face camera. The grooves on the side are where the rings go. You can tell it's a diesel because its a cupped crown. gas engines aren't like that/
Piston from a 1974 Honda Civic 1200 cc gasoline engine. This is an oversized piston because the engine was bored, among other things. It had Nissan valves and the ends were not properly hardened, so one was pushed through the retainer and fell into the cylinder at around 7,000 rpm. I kept the piston and connecting rod as a memento. The valve cover and oil pan went onto the new block and head. Everything between was new.