There are a lot of variables to consider, but Coombs/Wilson makes it one of three issues, 1952, 1954 and 1961. An engraving on the reverse makes it a 1952 issue, Parliament House on the reverse makes it a 1954 or 1961. A serial number beginning with AG makes it 1961 most likely, but I am unable to make any further distinguishment. In good condition (circulated and a little knocked around) and depending on any other peculiarities it could be worth anything between $25 and $425 AUD. A reputable coin dealer will be able to give a more accurate valuation.
An Australian Five Pound note (Coombs/Wilson - serial TC 71), uncirculated and in absolute mint condition could fetch anything up to $1,050 AUD. If it has been circulated but still in good condition, it might fetch anything from $32 to $350 AUD.
A reputable coin dealer will be able to give a more accurate valuation.
We'll need more information to answer your question - what ARE the signatures on the note if they're not Coombs and Wilson. What condition is the note in and what is the serial number? What designs are on the note?
A 1952 Australian 10 Shilling note (Coombs/Wilson)(depending on the serial number), uncirculated and in absolute mint condition could fetch up to $2,000 AUD. If it has been circulated but still in good condition, it might fetch anything from $50 to $725 AUD. A reputable coin dealer will be able to give a more accurate valuation.
The Australian Ten Shilling note had "Half Sovereign" printed on them from 1915 to 1933. To get a valuation, please provide the serial number and the names of the two signatories.
An Australian 1954 to 1961 Ten Shilling note (Coombs/Wilson)(depending on the serial number), uncirculated and in absolute mint condition could fetch anything from $400 up to $32,500 AUD. If it has been circulated but still in good condition, it might fetch anything from $25 to $18,500 AUD. A reputable coin dealer will be able to give a more accurate valuation.
A Reserve Bank of Australia Ten Shilling note (Coombs/Wilson - Serial AH 56), uncirculated and in absolute mint condition could fetch anything up to $450 AUD. If it has been circulated but still in good condition, it might fetch anything from $25 to $200 AUD. A reputable coin dealer will be able to give a more accurate valuation.
A Commonwealth of Australia 1954 Ten Shilling note (Coombs/Wilson)(serial AC to AF), uncirculated and in absolute mint condition could fetch up to $600 AUD. If it has been circulated but still in good condition, it might fetch anything from $30 to $275 AUD. A reputable coin dealer will be able to give a more accurate valuation.
An Australian Ten Shilling "Star" note (Coombs/Wilson)(serial AE), uncirculated and in absolute mint condition could fetch anything up to $76,000 AUD. If it has been circulated but still in good condition, it might fetch anything from $1,200 to $19,500 AUD. A reputable coin dealer will be able to give a more accurate valuation.
The most valuable Australian Two Dollar note, in mint uncirculated condition, would be the 1968 (Coombs/Randall) note in the serial range FKD to FPS which might fetch up to $295 AUD.
An Australian Ten Shilling note (Riddle/Sheehan)(serial E79235441), uncirculated and in absolute mint condition could fetch anything up to $12,750 AUD. If it has been circulated but still in good condition, it might fetch anything from $325 to $4,250 AUD. A reputable coin dealer will be able to give a more accurate valuation.
A Commonwealth of Australia Ten Shilling note (Coombs/Wilson - serial AH 18), uncirculated and in absolute mint condition could fetch up to $450 AUD. If it has been circulated but still in good condition, it might fetch anything from $25 to $200 AUD. A reputable coin dealer will be able to give a more accurate valuation.
A Commonwealth of Australia 10 Shilling note signed by H C Coombs and Roland Wilson were issued in 1952 and 1954 as the Commonwealth Bank of Australia, and in 1961 as the Reserve Bank of Australia. A Commonwealth of Australia 1952 Ten Shilling note (Coombs/Wilson)(serial number A/7 to B/49), uncirculated and in absolute mint condition could fetch anything up to $1,800 AUD. If it has been circulated but still in good condition, it might fetch anything from $50 to $725 AUD. A Commonwealth of Australia 1954 Ten Shilling note (Coombs/Wilson)(serial number AC/00 to AF/19), uncirculated and in absolute mint condition could fetch anything up to $600 AUD. If it has been circulated but still in good condition, it might fetch anything from $30 to $275 AUD. A Commonwealth of Australia 1961 Ten Shilling note (Coombs/Wilson)(serial number AF/20 to AH/65), uncirculated and in absolute mint condition could fetch anything up to $425 AUD. If it has been circulated but still in good condition, it might fetch anything from $25 to $210 AUD. A reputable coin dealer will be able to give a more accurate valuation.
Your question is a little confused. Australian banknotes are not dated. They all have the signatures of the Governor of the Reserve Bank of Australia and the Secretary to the Treasury. Possibly Coombs and Wilson. These two names will help to pinpoint the date of the banknote. All Australian banknotes have a serial number. The serial numbers of banknotes from this period will have two alpha characters above two numeric characters (written like a fraction) followed by six numeric characters. The star at the top is part of the Australian Coat of Arms.