The Pattern 1770 is one of 2661 wooden mechanical patterns from the pattern store on the second floor of the House Mill (Location: https://goo.gl/maps/MuzyR47wtoZfDWNM7/) .
Those patterns were made by carpenters as the precise wooden replica of every single part of different machines to cast replacement components for broken machines.
Pattern 1770 is a representative poor-conditional pattern with breaks and cracks due to the drying out of the softwood, and with historic decay due to the woodworm.
The House Mill official website:
https://housemill.org.uk/