The first generation of Concertos/Concertinos  are part of the "Concert Series" launched sometime in the early to mid 90s.

Most unique features of these cocert series speakers are then they have frontal tweeters that are offset, and the speakers are sold as symmetrical pairs. Also the leather wraparound and brass studs at the side cabinets.

Those familiar with older SFs would recall that the even older Electa/Elec-Amator speakers have the tweeters placed upper left of the woofer for both left n right units. With the grilles removed, it was visually disturbing (although SF claims there was no audible difference in doing so). But as market forces would dictate, SF eventually create symmetrical offset bookshelf speakers and these were the Concert series. Tweeters positioned inwards as recommended by the manual.

The Concerto is the bigger brother, with a 6" cone whole the Concertino  has a 4 or 5" cone.  Both have front firing ports (also offset from the centre axis), and the cabinet sides have visible brass studs, as part of the cabinet internal bracing frame.

I have a pair of the 1st Gen Concerto. A very good friend of mine has the smaller Concertino. And he's thinking of  selling them.
(Mkt price going for RM3K someone said ? ... pls PM me ! )

Then came the "Concerto Grand piano" which is a floorstander with glossy piano finish for the side cabinets.

I would like to suggest to list out the models according to the different generation in the first page of this Sonus faber thread. 
It will be even better to include some photos of the models.. 

Hopefully, some of us here can help to gather the info...

come to think of it ... the current "Toy" model would be very similar to the  Concertino 1st gen.

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Added on July 19, 2009, 6:35 pmhttp://www.hifi-notes.com/sonusf2/indexsf.htm

http://www.hifi-notes.com/sonusf2/concertino.htm
http://www.hifi-notes.com/sonusf2/concerto.htm

http://www.sonusfaberclub.com/home.html

I remember seeing Sonus Faber history which shows various speakers in different timeline in Sonus Faber website last year, but now it's gone.

I saw concetino home trade in unit going for 1.9k at a hifi shop.

I was too late to grab it for my friend

those who are very interested with TOY.. and very serious buyer. pls do drop me a PM.
i might organizing a bulk buy of the TOY in order to get cheaper price.
in fact. much cheaper than the price listed in hifi show. yet can get full warranty from perfect hifi and sonus faber. with official receipt.

wow .... u guys planning a group purchase of Toy speakers ?

Thats alot of money man ....

yeah. seems the price is hike up. i not sure why oso.
so i manage to called alvin today. and have a brief discussion. that i might able to get each TOY slightly under RM 4K which is similar with previous price if not cheaper.

by getting more quantity i can have more "power" to talk with them regarding the price.
i myself have two serious friend who already decided to take it.
so my intention is to keep the price of my friend as low as possible.
i myself won't involve with the deal. i am just gather all order and get a bulk price. while all money will directly transfer from buyer to perfect hifi account. and official receipt will also issued for each buyer of the TOY.

so it is no different as in each purchase. the only different is we all have to strike at once. and hence get cheaper price.
of course i myself did request alvin to treat me some good meal if it was really happened. lol.