UBB.threads Forums Edged Weapons SA & NSKK Dagger Forum Real NPEA Student Dagger?

Thanks Dons, any help on which book would be ideal for a valuation?

"NPEA DAGGERS AND ASSOCIATED KNIVES - A COLLECTOR'S GUIDE" By Ron Weinand

OR

"Waffenleite - Presenting NPEA Daggers of the Third Reich" same author