Thanks for your help. I fussed with this stamp for a long time. I still can't find it using my 2012 Scott catalogue. But I'll take your word for it that it is #10NB1.
Your assistance is much appreciated.
Regards,
Don
Further note:
OK. I just found it on page 249 of my 2012 Scott catalogue. Boy, that was a tough one to find. Thanks again.