A Bank of England 1963 Ten Shilling "replacement" note (Series C - red/brown)(Chief Cashier J.Q. Hollom - serial M35), uncirculated and in absolute mint condition could fetch anything up to £50 GBP. If it has been circulated but still in good condition, it might fetch anything from £11 to £25 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
Without additional context, the value of a Bank of England Ten shilling note with serial number 18Y 015906 would depend on factors such as its condition, rarity, and demand among collectors. I recommend consulting with a currency appraiser or a numismatic expert for a precise valuation.
Please check the serial number and provide the name of the Chief Cashier if possible.
It is worth 5 pence if you mean the English shilling
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial T41), circulated but still in good condition, might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier J.S. Fforde - serial C89N), uncirculated and in absolute mint condition could fetch anything up to £10 GBP. If it has been circulated, not much. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial C02), circulated but still in good condition, might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial H47), circulated but still in good condition, might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series A - mauve)(Chief Cashier K.O. Peppiat - serial N64D), uncirculated and in absolute mint condition could fetch anything up to £65 GBP. If it has been circulated but still in good condition, it might fetch anything from £20 to £34 GBP. A reputable coin dealer will be able to give a more accurate valuation.
I have no way of knowing whether or not it was circulated, but the serial number of the last Bank of England Ten Shilling note commenced with D38N and possibly ended with 999999.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier J.S. Fforde - serial C30N), uncirculated and in absolute mint condition could fetch anything up to £10 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £4 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial H90), uncirculated and in absolute mint condition could fetch anything £10 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial A12), uncirculated and in absolute mint condition could fetch anything £12 GBP. If it has been circulated but still in good condition, it might fetch anything from £3 to £9 GBP. A reputable coin dealer will be able to give a more accurate valuation.