Sorry for having to ask, but this concertina on E-bay isn't familiar to me. I don't think it is any of the better makes like Wheatstone, Crabb, or Lachenal, but it doesn't look like your typical Scholer, Bastari/Stagi/Brunner, or cheap Chinese. It does have a mother-of-toilet seat finish.
It's here:
http://www.ebay.com/itm/36-Button-Anglo-Concertina-/161050185760pt=LH_DefaultDomain_0&hash=item257f56d020#ht_159wt_1255
Terrence