This is the UK version of a document issued to Shimano Dealers. You got two luxury ring binders resplendent in hand-tooled Naugahide - and every year your trusty local Shimano Distributor sent you a pack of pages to put in them. Each page covered a particular model and had a complete exploded diagram and part numbers for those parts that were available as spares. Handily each page was also coded with a date. Not quite so handily, your distributor rarely seemed to have the actual spares in stock - but good things come to those who wait. The point of listing spares for the Shimano Tourney TY05, and its like, also escaped me - the packaging for the spare part probably cost more that the whole derailleur.
This magnificent service covered Shimano’s model years 1994 to 2004 (by which time CD-ROMs and the Internet had taken over). As ever Shimano’s model years run one year later than the actual date of release - so model year 1994 products would actually hit the shelves in late 1993 etc..
It had its idiosyncracies - some models appear twice and some are missing. The models that appear twice usually do so because they were originally launched with one pulley cage length and subsequently another length was added (see the Shimano Dura-Ace (7700)) . The models that are missing are usually exotica that tried the patience of Shimano Europe (the Shimano Airlines (AR01) is a case in point).