Akon I know about this book - it is in fact a mini encyclopedia of the Swiss Air foces, aircraft, engines, guns, bombs, etc.., therefore it is a compilation of short summaries - for bombs, from what I have seen, they are rather good I must say - but only summaries with very limited iconography, as the scope of this book is very wide - this is its main shortcoming (beyond being somewhat overpriced - but this last point can be discussed in face of the huge ammount of work involved in the creation of such a book).
There is a lot of quality material that was not used in this book officially dedicated to aerial armament (but not really, as I already stated) such as the excellent bomb posters from the Thun munition fabrik / forces d'aviation suisse, that appear from time to time at swiss auctions - I posted some time ago on this forum such a poster of the 3kg splitterbomb.
Anyway - the answer to my question is not to be found in this book.