B yen was first issued as occupation currency during the Okinawa campaign. It was used in Japan from September 1945 until 1948. It continued to be used in the Ryukyus until 1954. Most denominations are common except the 1000 yen. A large group of AU-UNC 10 sen through 20 yen notes came out about 10 years ago from a former Navy finance officer. The scarcer varieties of the lower denominations include the B-B, C-C and D-D blocks. The original notes were printed by Stecher-Truang. Replacements from the Stecher-Truang have the letter H as the prefix. Replacements for the BEP printed B-B block notes do not have a suffix letter.
I do not know what this is supposed to mean. You asked about B yen. The highest denomination B yen is 1000 yen. The highest denomination A yen is 100 yen.
Thanks for explaining it lettow, I got a bit confused there. It seems that you know a bit about them. Is$60 a fair price for a set of 10 sen-100 yen in Au(I can't tell the grade very well, so this is conservative)?
$60.00 would be a little high for this set of B yen in AU. I was getting about $35.00 for UNC sets of the 10 sen - 20 yen on EBay. It would be a fair price (not a great deal but not a bad price either) if all were UNC.
That's the thing, it looks Unc but I don't have much experience with grading so I'm assuming it's Au.