Based on the cast brass label, which was used between 1875 and 1940, and the distinct Art Nouveau design, I am dating this set as being circa 1910.
Thank you to the Smithsonian website (https://www.si.edu/ahhp/Marks and https://www.si.edu/ahhp/deskaccessories) for their invaluable information on Bradley & Hubbard.
The base of the stamp holder is 2 1/2" x 1 3/4". The blotter corners are 3 1/8" x 2 1/4" x 2 1/4". The pen tray's base is a little over 9 1/4" x a little less than 2 1/4".
Please note there is some pitting and discoloration to the brass. I did not clean any of these pieces as I prefer to leave this up to the discretion of the new owner. Do let me know if you'd like more photos as I'll be happy to oblige.
Thank you for looking.
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