I've always tried to keep a consistent era on Lambing Flat, though I haven't always succeeded! Ostensibly, the layout is set in the mid-1950s, but with my excursions into pre-WW2 models and the fabulous r-t-r early diesel era models that have come onto the market over the last couple of years, LF's timeframe has 'stretched' a little.
However, while rollingstock can be taken on and off the layout to suit a particular timeframe, the fixed infrastructure can't, and so it is the buildings and other infrastructure that really sets the timeframe of a layout, rather than the rollingstock. Luckily for my preferred eras, NSWGR branchline infrastructure didn't change all that much from the early years of the 20th century till the mid-1970s, so I can 'stretch' my timeframe a little without having to call in the Detail Police and arrest myself!
About the latest I can go with levels of traffic I prefer to run is about 1974, when the 'fuel crisis' of the time gave the Department an excuse to cut most branchline passenger services. Once the passenger services went, the rot really set in, with the beginning of wholesale demolition of buildings and progressive reduction in services till, by the late 1980s, just about everything had gone; freight, stock and all, with the only thing left on most branchlines being bulk wheat. Even that went in most places eventually, leaving very little of the former extensive NSW branchline network intact by the 2000s.
So here is another photo 'from the vaults' (this one was taken on 30 December 2005, before the layout went DCC), showing Trainorama 4429 arriving at Lambing Flat, circa 1970-72, with the remnants of the Mail. (Click through for a bigger view.)
The train, as was typical of the period, has an MLV (Rails North epoxy kit) for parcels, and FS and BS (modified Trax) for the sitting passengers, then an EHO (see EHO1473, or is it 1469? earlier in this blog) for the guard and more parcels, then an ACM (Rails North epoxy kit) for the few remaining sleeping car passengers, with a CR (Workshop 5 epoxy kit) bringing up the rear with the through passengers to Murringo (the car will be detached and added to the Murringo Mixed after the 44 class has run around. The 48 class hauled Murringo Mixed will then enter the platform once the Mail has departed for Cowra). The yard is very quiet, a few S trucks at the goods shed in No.1 siding, while a K truck is being loaded with wool in the back road. The old D truck, of no use now that there is no steam locomotive ash to distribute as ballast along the pioneer line to Murringo, will soon disappear from the scene, probably sent to Junee to be burnt.
This was the how things looked at the very end of the NSWGR era. With the advent of the PTC and then the SRA, the passenger service will be cut back severely, then replaced with a road coach, the general goods and stock traffic will be abandoned and all that will be left will be bulk wheat and the occasional enthusiast tour...