Type 11 A continuous roller type, with each impression of 'GPO' letters 5 mm high, separated by 5 unbroken lines or bars. Mainly used on newspaper wrappers, parcels and Large Chalons (probably for payment of bulk postage). There are also several examples known on 5s Chalons thay may or may not be genuine - perhaps also for payment of bulk postage? It is known with both thinner and thicker lines as well as differently shaped letters, strongly suggesting that more than one implement was in use.
Examples are known used from the Chalon era to 26 November 1903 but these dates may be incomplete as very few examples have dates associated with them. Best collected on wrappers or multiples showing the continuous roller impression. Rated common

3rd Sideface - Newspaper wrappers
Brisbane obliterator type 11 rated common
Brisbane obliterator type 11 rated common. Seen in Spink auctions no 12043 lot no 1245. Ex Alan Griffiths
Brisbane obliterator type 11 rated common. Seen in the Queensland Stamp Collecting Facebook Group
- GPO Obliterator type 11 (late 1870s to circa 1905) rated Common

There are three types. Type 10 (not shown here and found only on Chalons has 6 lines), type 11 has 5 lines with letters 5 mm high and type 12 has 4 lines with letters 6 mm high. The shapes of the letters varies according to the subtype. The elongated 'P' is found in both types 11 and 12
Chalon
Brisbane obliterator type 11 rated common. This example suggests that one of the types also had a framed vertical line
Brisbane obliterators type 11 rated common
Chalon - 5s examples
1st Sideface
2nd Sideface
2nd Sideface - Newspaper wrappers
3rd Sideface
Brisbane obliterator type 11 rated common
Large Chalons
Brisbane obliterator type 11 rated common. Dated 26 November 1903. Seen in Phoenix auction no 5. Ex Kiddle
Brisbane obliterator type 11 rated common. Seen in Spink auctions no 12043 lot no 1245. Ex Alan Griffiths
Brisbane obliterator type 11 rated common. Seen in the Queensland Stamp Collecting Facebook Group