John Page was the Chief cashier of the Bank of England from 1970 to 1980.
A Bank of England 1971 One Pound note (Series C - green)(Chief Cashier J.B. Page - serial S89M), uncirculated and in absolute mint condition could fetch anything up to £25 GBP. If it has been circulated but still in good condition, it might fetch anything from £6 to £10 GBP. A reputable coin dealer will be able to give a more accurate valuation. A combination of the Chief Cashier and the serial number can pin the note down to a year or two.
A Bank of England Five Pound note (Series D - blue)(Chief Cashier J.B. Page - serial BT71), uncirculated and in absolute mint condition could fetch anything up to £20 GBP. If it has been circulated but still in good condition, it might fetch anything up to £12 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Five Pound note (Series D - blue)(Chief Cashier J.B. Page - serial 84D), uncirculated and in absolute mint condition could fetch anything up to £30 GBP. If it has been circulated but still in good condition, it might fetch anything from £8 to £15 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England 1975 Ten Pound note (Series D - brown)(Chief Cashier J.B. Page - serial B56), uncirculated and in absolute mint condition could fetch anything up to £40 GBP. If it has been circulated but still in good condition, it might fetch anything up to £25 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series D - green)(Chief Cashier J.B. Page - serial 54X) uncirculated and in absolute mint condition could fetch anything up to £5 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Five Pound note (Series D - blue)(Chief Cashier J.B. Page - serial 02N), uncirculated and in absolute mint condition could fetch anything from £5 up to £30 GBP. If it has been circulated but still in good condition, it might fetch anything from £8 to £15 GBP. A reputable coin dealer will be able to give a more accurate valuation.
You do not specify the Chief Cashier or the type of One Pound note. A Bank of England One Pound note beginning with Serial 37J could have been - 1934 - Chief Cashier K.O. Peppiatt - Series A green - Britannia on the front and the Bank of England building on the reverse. 1960 - Chief Cashier L.K. O'Brien - Series C green - QEII on the front and Britannia on the reverse. 197? - Chief Cashier J.B. Page - Series D green - QEII on the front and Isaac Newton on the reverse.
The signature on New Zealands banknotes is that of the Chief Cashier or Governor.Since New Zealands first issue of banknotes, the New Zealand Chief Cashiers/Governors have been -L. Lefeaux - 1934 to 1940 (Governor)T. P. Hanna - 1940 to 1953 (Chief Cashier)G. Wilson - 1953 to 1956 (Chief Cashier)R. N. Fleming - 1956 to 1967 (Chief Cashier)D. L. Wilks - 1967 to 1973 (Chief Cashier)R. L. Knight - 1973 to 1977 (Chief Cashier)H. R. Hardie - 1977 to 1984 (Chief Cashier)S. T. Russell - 1984 to 1988 (Governor)D. T. Brash - 1988 to 2002 (Governor)A. Bollard - 2002 to present (Governor)
A British One Pound note (Series C - green)(Chief Cashier J. B. Page - serial HZ35), uncirculated and in absolute mint condition could fetch anything up to £8 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP. Three consecutively numbered notes would possibly fetch a little more as a set. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series C - green)(serial W50A - Chief Cashier J B Page), uncirculated and in absolute mint condition could fetch anything up to £5 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP. Alternatively, they are worth £1 GBP if returned to the Bank of England. A reputable coin dealer will be able to give a more accurate valuation.
New Zealand Ten Shilling notes (Chief Cashier - T.P. Hanna) will have serial numbers as follows - Number over letter - 0/J to 3/H Number over date - 0/47 to 5/54 The date represents the last two digits of the year (1947 to 1954). Letter over number - A/0 to A/5 T.P. Hanna was Chief Cashier from 1940 to 1956.
The date is not printed on the banknotes of many countries. To get a rough year for New Zealand banknotes, you need to identify who the Chief Cashier or Governor of the Reserve Bank of New Zealand was. His signature will be on the front of the note. For New Zealand predecimal banknotes, the Governors and Chief Cashiers are as follows - Governor L. Lefeaux - 1934 to 1940. Chief Cashier T.P. Hanna - 1940 to 1955. Chief Cashier G. Wilson - 1955 to 1956. Chief Cashier R.N. Fleming - 1956 to 1967.