Copper memorial shield priced £1200 by Emporium Antiques of Liskeard.
He lost his seat the same year following a controversial election petition by the defeated candidate alleging illegal payments to potential voters.
Agar-Robartes was elected to the St Austell Division of Cornwall in a by-election in 1908, holding the seat until his death at the Battle of Loos in 1915 following action for which he was recommended for a Victoria Cross.
The shield is copper on oak and priced at £1200.
