Answering questions on this forum can be a challenge, esp. when key information is omitted. In this case, "mustering at a cattle station" did not suggest a location in the western US. I checked your IP address for the post and see that you are in Australia.
The large numbers on the base of the bottle say UK origin to me - although I must admit that my knowledge of UK and AU bottles is not up to that of the US. I can tell you that both Arthur Peterson's book on bottle markings and Toulouse's book mention an Anchor Glass Company in Mt. Pleasant, Pennsylvania. However, Peterson, says this mark was used on labels.
There is also a brief mention of an Anchor Glass Co. in London - the mark shown is similar in size and detail but not exactly the same.
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Age-wise, this is a later 19th century bottle.
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I believe @jericho was referring to mold seams - likely the seam goes up the body but not all the way up the neck.
