A window sash is a type of moveable window frame that can slide, usually vertically. Unlike a window frame built into the wall, a sash allows glass window panes to slide up and down. The sashes fit inside a track that runs along another window frame attached to the house. Lead weights traditionally counterbalanced sashes, but today they are counterbalanced by springs. The traditional sash window is double-hung; this means it has two sashes that can both slide along a vertical track. However, some sash windows have a single moveable sash, and sashes may slide horizontally. A sash usually contains panels of glass, called lights. The lights are traditionally held together by a grid of bars. The sash window was developed in 17th century England and allowed for greater airflow. The sash window has had a significant impact on western architecture, used in nearly every style of English domestic architecture since the late 17th century. The subject item is a template used by the carpenter to mark or scribe the vertical track in which to window will slide up and down.An item used when sash windows were made by hand from the 17th to the early 20th century. The template allowed the carpenter to mark accurately a channel that was then planed and the Mitre to join the bars.Wooden Ovalo sash template with two screws each side. It has slot along length and has 45 degree bevelled edge each end.Noneflagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, wooden ovalo sash template, ovalo sash template, template, sash template, sash templet, window sash, tool