O Gauge 

O Gauge Coarse Scale 

Coarse Scale O gauge Was Common in the 1920-1950 but is much less so these days with most modellers electing to go for the finer scales The exception to this is, of course, the Collectors  of older trains and some of the new product by ACE  ETS Lionel and Others

The "Hornby Railway Collectors Association of Australia  is well known for this side of the hobby  and a link to their web site is in the links page The following Gallery pages and videos illustrate this aspect of the Hobby 

O Gauge Scale 

Fine Scale O gauge was very uncommon in the 1920-1950 but is much more popular these days with most O gauge modellers electing to go for the finer scales 

Fine Scale O gauge is very expensive unless one is prepared to scratch build. However, in more recent times companies like Bachman have entered the field with mass manufacturing making it easier for modellers to afford a small layout. The Gallery is mainly NSW prototype so more photos of other fine-scale O Gauge models would be welcome