These were inserted into tan envelopes reading RHODE ISLAND HOSPITAL NATIONAL BANK, 15 WESTMINSTER ST., PROVIDENCE, R.I. and imprinted with the bank’s logo. Those distributed by dealer Grant were mailed in envelopes marked GRANT’S HOBBY SHOP, HORACE M. GRANT, PROP. 109 EMPIRE ST., PROVIDENCE, R.I.

https://www.coincommunity.com/commemorative_histories/rhode_island_tercentenary_half_dollar.asp