Numeral 27 is a great example of why Partime's link is somewhat inadequate.
This numeral was first allocated to Huskisson in 1850, with this office closing at the end of 1851. Therefore, this TYPE of postmark will only be found on Sydney Views and Laureates.
The numeral (NOT the device) was reallocated to Rockley, probably in 1857 when the first rays type was issued. There were two device types used at Rockley, both pictured below.


The R Rod refers to stands for reallocation.
