The Master series of exposure meters made by Weston in the 1950's were a line of high quality meters for the amateur photographer and were known for being durable and reliable.
The Master IV is a sturdy meter with metal and hard plastic casing in a cleverly designed leather case. Detailed instructions for it's use can be found for free online and while it looks complex, it is actually quite simple to use once you know all the functions.
Has some interesting features, one being a needle lockup switch on the right hand side to keep the needle from bouncing around during transport. Can be used in bright daylight or in lower light settings, you would open the door on the back which uncovers the selenium cell and changes the scale of the meter.
In excellent condition with only minor marks from normal wear but no damage to it. Comes with leather case as shown