The heritage listed building served as a Court of Petty Sessions from 1869 to 1970 when it became the local police station until 1987.

The community is invited to peek inside the Prince Street building as they celebrate its 150^th anniversary with a colourful event.

The museum's volunteer committee will host an open day from 10am until 4pm this Saturday, July 27 with a range of demonstrations planned.

Museum President Jo Foley said there will be plenty of period attractions to offer visitors apart from the chance to view the museum's collection which includes shipbuilding, exploration, maps, documents photographs, memorabilia, household items, timber-getting, agriculture and the history of the settlement of the Williams River.

The day will open with a Welcome to Country and a smoking ceremony and pending no emergencies in Sydney, two members of the Mounted Police will attend.

A town crier will help keep proceedings announced and committee members will be in period costume.

There will be demonstrations of stone masonry, stained glass making, a blacksmith, woodturning and a whip maker.

For a gold coin donation you can have your photograph taken in the stocks in the museum grounds which are usually locked.

The cream tea stall will feature home made scones with Jo's special plum and mulled wine jam, a recipe she procured from England.

One of the non traditional elements on the day will be a sausage sizzle.

Later in the evening the Clarence Town Bowling Sport and recreation Club will host a trivia night. The fun starts at 6.30pm and costs $10 a head with prizes.

The museum is open every second Saturday 10am-2pm.