The stamps were not issued, thus no number in the catalog. The note in Scott states that this stamp is from a set of 10 with a value of $10. I would call it a value of $1 for each item in the set.
They are found imperforate too. If memory serves, back in the 1930s Scott listed these and others of doubtful background. My old International volume 2, 1901-1920 has spaces from some stamps no longer appearing in Scott. Ebay is a good resource when you have questions.
