Nice med, I'd think only a Maine collector would know for sure. There's a smaller variant on Etsy for $12, another on Ebay that didn't sell for $7.47. So an educated guess is it might be rare numbers wise, but not particularly valuable...
From 1906....
"The recent appointment of Frank W Bucknam of Skowhegan, Maine as Commissioner of Pharmacy in that state marks another milestone in the progress of this very successful young man. [He]... was born in Yarmouth, Maine on December 7, 1869... [He] graduated from a business college in Portland [Maine] graduating in the winter of 1890. He entered the drug business as apprentice with L. R. Cook of Yarmouth and received as certificate as registered pharmacist from the Maine commission in 1894. He had a business in Yarmouth until 1900, when he moved to Skowhegan. He did a fine business there until 1904, when his business was wiped out by a fire. The fact that he was doing a business with a new and well selected stock within 36 hours demonstrates his hustling qualities. Today he is located in the handsomest store in Maine, if not New England."
“His store features an imported tile floor, steel walls and ceiling. The wall cases are of solid mahogany with bevel plate glass mirrors and doors. The showcases... are all solid mahogany… and lighted with electric lights. The prescription department is modern in every way... A waiting room with fireplace, easy chairs, writing materials, etc. is a novel feature..."