Thanks Lawrence - every day is indeed a school day and today I've learnt about the body, tip dot system!
"The 'body-end-dot' or 'body-tip-spot' system was used for radial-lead composition resistors sometimes found in vacuum-tube equipment; the first band was given by the body color, the second band by the color of the end of the resistor, and the multiplier by a dot or band around the middle of the resistor. The other end of the resistor was colored gold or silver to give the tolerance, otherwise it was 20%"
Main outcome is that the resistor R31 should be 15kΩ
