Hopefully BobTheFloat can answer that one? It's pleasing to see that there are now at least 3 of us who appreciate these Japanese beauties - there's just too many francophiles out there for my liking, obviously they prefer horse meat to Kobe beef
If interest continues to grow there's a chance that they may rocket in value and may even reach double figure sums in the near future
I'm trying to ascertain from your pictures if the drag recess is deeper on the H allowing it to accommodate the additional washers? Or are the washers in the 6 stack thinner?
I recently bought a 7300H for a bargain price from fleabay! I particularly like the colour combination. Condition after a light clean is realy very good considering its age, which I believe is around 1975? Opening it up - which on this reel you can do on both sides as it effectively has a central chassis flanked by two side plates - revealed the grease had turned to a hard wax the colour of molasses but the internals are mint and it's really nicely engineered. I stripped the line off and set the spool soaking to lift off the grime. On disassembling the drag stack I was expecting to find a series of 6 washers as advertised on the front of the drag knob but no there were only 3! One keyed steel, followed by a single felt, topped with a plain round steel. Strangely there doesn't appear to be room for any more. So does my reel have the wrong drag parts, wrong spool or were Daiwa telling fibs? 
