Sadly that nice decorated blade is sitting in an Italian museum, not my collection.... It's shape is similar to the billhooks of the West Country of the UK - large beaks are found on Devon and Dorset patterns. Personally I find a 9" medium weight hook adequate for my needs, although I do also use a 10" from time to time (generally whatever hook is lying to hand and is sharpened and ready to go...). I'll try and get into my shed this week and sort some blades out and take some photos... The UK military hooks are probably the heaviest pattern readily available - personally I do not like them, but it all depends upon a) what you are cutting and b) how long you are using it c) your hand size d) your strength....
Very pleased that you like the website - it's there to pass on information - after 40 years of collecting I have a wealth of knowledge tucked away in my head and my archives - best to share it while I still can.... I also collect many things - the magpie effect.... Back in the 70's I bought an old chapel to convert to a house, and needed building/carpentry tools, so I used to go to the local auctions and buy anything and everything - I have tools for all trades, and have built an extension on the house we now live in - all my own work except the plastering ( I can do it, but am too slow). Also having served an engineering apprenticeship followed by 40 years of teaching craft and design (wood, metal, plastics, etc) and I have a lot of kit.... I also have collected oilcans (gave them to a French friend who collects), corkscrews, tin openers, bottle openers and nutcrackers - and my wife is into kitchenalia and also collects 'cream and green' enamel ware, button hooks and baskets.... Not only is the house full, so are all my sheds and garages - hence building a new one at the moment... We really ought to downsize.... or at least get rid of the hevaier stuff - tractors, stationary engines etc....