This is a vintage Washburn tremolo, highly regarded and sought after as they are made by Schaller and have replaceable knife edges. This one has a set of new ones. 37mm block. Most likely from the late 80s-90s, think Floyd Rose original quality. Just the tremolo and arm, no fixings etc. I am a luthier by trade and acquire a lot of spares, some of which I'm clearing out to make space, so do check my other listings. Any questions, please just ask