Hello and Welcome to the NAWCC message board.
Your wooden cased mantel clock is shown in Tran Duy Ly's Sessions Clocks, Arlington Book Co, 2001 in a catalog illustration from 1915. Clocks could have been made a few years either side of the date shown. The model is Superior No. 3, There was also a no. 1 and a no. 2 with the main differences being slight case changes.
It is listed as 19 inches H, 15 1/2" w . Eight day with half hour strike, six inch dial. It was available in either oak or mahogany. Your oak case looks to have been refinished.
Best,
Richard T.