if at any time during the period of cover the items or any part thereof entered in the Schedule shall suffer any unforeseen and sudden physical loss or damage from any cause, other than those specifically excluded, in a manner necessitating repair or replacement, the Insurers will indemnify the Insured in respect of such loss or damage as hereinafter provided by payment in cash, replacement or repair (at their own option) up to an amount not exceeding in respect of each of the items specified in the Schedule the sum set opposite thereto and not exceeding in any one event the limit of indemnity