Made by Ben (Brandubh), with fittings and studs from Billy and Charlie's, painted by Ben: http://www.billyandcharlie.com/, and medallion from Drachenstein Treasures: http://www.dragonsjewels.com/. Made in January 2012.
The motto says "levitate et caritate", which means "with levity and affection". As far as I can tell, adding mottoes to collars was not done in this period. However, this was my preference for this piece of regalia.