Caaarn Brizzo, All the way ta Beezerville, superficialities will be fine, if it looks like a Beeza, it's a Beeza...
looks like the hole in the side of the crankpin only matches the hole in the big end shells when the piston is half way up the bore.
,
reduce pressure to the bigend once every revolution,
Beg to diffre Bill (that's the French version), there's two holes so it gets a squirt on the down-stroke also....?? which would likely do farque-orl, except be scraped straight into the scavenge zone.....??
A bit off tangent,
I have a Lister 3-1/2 HP that I've spent some intimate time with, and it has no oil pump, just relies on splash lube, via a tang on the bottom of the big-end cap, and on either side of the rod is a oil feed hole into which -funnily enough- oil is fed, well funnelled really, as the holes are about from memory~ 3/16" (give or take an inch~), with a big entry bevel. The big-end shells have (originally had) scrolls carved into them to direct the oil, kinda like in g'box/cam/idler bushings, and that is the total oil feed.
And last time I used it worked fine. must tend to that too.....