These are nearly the same type I make. A frame saw is a useful and simple introduction to woodworking and tool-making. If you are interested in woodworking, Paul Seller’s blog has a lot to offer.
From Paul Seller’s:
If you have not yet made one of these you should. They are quick and simple to make and give you the European push and pull stroke saw in a single saw which is useful depending on where you want to…
Source: Making a frame saw
Preindustrial Craftsmanship 