M Goulston Master Tailor One Hundred Pound 1880

Reference: Australian Promissory Notes and I O U s’
Promissory Note.
Merchant: M Goulston Master Tailor.
Queen Victoria Building George St. Sydney.
Denomination: One Hundred Pound.
Serial Number: 485142.
Circa: 1880.
Grade: Very Fine
Historical Notation: The promissory notes was issued by M Goulston Master Tailor to the value of 100 Pound for the making of tailor made suits, shorts etc.
The note is very rare and in a grade of Very Fine, tears, from researching Goulston it appears all One Hundred Pound Shinplasters had the same serial number, quite curious?
RR: $6000.00. In a grade of Uncirculated.
Source: Renniks 25th edition Banknote/Coin Catalogue 2014. Page 161.