Just for the sake of understanding, The Sears engines for 1909 into 1911 were two cylinder opposed, with the cylinders set straight across from each other. They had about three variations of that design with pistons and/or connecting rods offset onto the crankshaft. The last of the 1911s and 1912 engines had a much better design with the cylinders still opposed, but the cylinders themselves were offset so that the pistons and connecting rods could be centered and straight rather than being offset.
In practice, having pistons and rods offset didn't work very well. Even at low compression and low speeds, the offset stresses caused big problems in relatively few miles. Early Sears engines were prone to breaking connecting rods and punching holes in the crankcase. Many early Sears cars had their engines replaced over the years with the 1911/'12 version.
In the "for whatever it is worth" department? My unknown builder early gasoline carriage has a very unusual engine, light weight, long stroke, no builder's name on it at all, atmospheric intake, water cooled, and no crankcase. The flywheel, crank pin, and connecting rod all operate out in the open. The connecting rod itself is like no other I have ever seen. What appears to be two piece brass pieces slip together to encase the crank pin held together by two steel bolts. The brass (or maybe bronze?) pieces are attached to a steel tube which attaches to the piston with a steel knuckle. The whole piece does not appear to be adequately strong, and if I ever get to trying to reassemble the engine, I will likely make a more substantial connecting rod and bearing. I would also add a layer of Babbitt.
Why did I mention this? The "bearing" is just the brass (bronze?) casings on the steel crank pin.