Yes, it is an old and special type of Tamagotchi. As it's name suggests, the Tama characters you get are angels. And other different stuff. Try finding them on eBay.
An Angelgotch was the Japanese version, while the Tamagotchi Angel was the English version. They were released back in '98 and can still be found quite frequently on eBay. (search for tamagotchi angel) Instead of dieing, the angels go back home to receive their wings. it was an answer to children who got very sad when their tama died. anyways, I recommend looking thru the Tamagotchi Ancestors pages here on TamaTalk for more info reguarding them.