Hi Geraint,
Thanks for the reply.
Yes, it was this online resource which brought the piece to my attention. It's one of the Kozuka listed (Lot 64) but I was hoping to see the reverse of the piece that would show the mei as I am interested in examples for the artist Nakagami Mototsugu. My gut feeling is that given the limitations in print, the catalog will not offer any additional images of the piece but I thought it worth checking.
All the best, Andy