This is a variation on my Hinged Chest with Working Lock and Wood Texture, which is based on athey's Small Hinged Treasure Chest. This is a two-part model intended for dual extrusion or multi-material printing. It was inspired by dbgeorge's remix which allows to print the two materials separately and then glue them together. If you have a multi-material printer, this multi-material model will save you the trouble of manually assembling the parts (although most likely the print itself will take much longer).
For other instructions like how to assemble the lock mechanism and how to operate the key, I refer to the original single-material model.
As you can see, this remix does not have the 200% size models with thinner walls. The reason is that making the separated multi-material version of the regular size chest was a ton of work already and I really didn't feel like doing most of it all over again for the larger model. Perhaps a few donations could change my mind though… ;)
Most of the remarks from the original model should still be valid. You should not need support material to print this if your printer passes the bridge torture test.
The print in the photo was made by xSnowHeadx and was printed at 80% size. In general I recommend to print at 100% size unless you are familiar enough with your printer that you know what it can handle.