Help With Vintage Item

I have a small booklet (1 1/4" x 3") with on the inside front and back postal rates information and in between see through pages. I believe the booklet was used to hold stamps to be used by the household -- perhaps a precursor to stamp booklets. Since it quotes a rate of 2 ct per oz and also has information about parcel post, which was not offered since 1913, this booklet must be from between 1919 and 1932. Does anyone know more about this item? I cannot find any item like this for sale. Binding appears to be leather.

Interesting piece of ephemera. I recognize the leather as being a very popular type used from around 1900-1930.

This could have been an item that a printing and bookbinding company made on their "down" or slow time. Leather scraps are too good/expensive to just throw away, but they are not big enough to be usable for books or Bibles. Perhaps this was a "favor" item they gave to their good customers.

I 'm just speculating. I've made and sold small Bibles and Devotionals on ebay using very nice leather that I couldn't use for anything else.

Thank you, bookbndrbob, that is certainly a possibility. I have vague recollections of seeing this type of booklet in BBC period pieces -- they are so good in the details -- and it being used by the family to hold their stamps. I wonder if the USPS offices ever gave them out. Cannot find any other example of it. I don't actually know what you would call it.

Search under "postage stamp wallet". These stamp storage wallets could be kept in a desk drawer or a vest pocket. Fine for short term storage. They helped keep stamps from getting stuck together and helped keep insects from removing the gum. Long term the acid secretions from the glassine interleaving would damage the stamps. Similar items were sold to collectors for saving blocks of stamps.

Thank you, jobi01, that was really helpful. I found some similar items using that term. Tx.