$2500 NZ dollars is about $1900 US. I'll have to take some photo's and post it here for you. Interestingly the action appears to have a very low serial number (or what i presume to be). It has marked Farquharson patent 93. I'm guessing that means it was number 93??
Surfing the net found this rifle forsale http://www.gunbroker.com/auction/ViewItem.asp?Item=97464156
and the action looks almost identical to this one. I was told that it was probably originally chambered in .461 Gibbs.