A British 1963 Shilling (English reverse), uncirculated and in absolute mint condition could fetch up to £1 GBP. If it has been circulated, not much.A British 1963 Shilling (Scottish reverse), uncirculated and in absolute mint condition could fetch up to £1 GBP. If it has been circulated, not much.A reputable coin dealer will be able to give a more accurate valuation.