Has anyone ever seen this model ?

Pulse Engine Hour meter (PET-3100)
The PET-3100 is smallest and most lightweight available engine hour meter with mere size of 30 mm x 30 mm x 15 mm and weight 15 gm. The PET-3100 count operation time actuated by induction pulse and has maximum measuring range of 9999 hours and 59 minutes.
This hour meter can be extremely useful for checking Engine performance monitoring time, testing time, vehicle operation life, vehicle service time, oil replenish time, water crafts, Boats service time etc. They can be mounted on Gasoline cars, Motorbikes, Scooters, Water Crafts, Lawn movers, Bush cutters etc. engines