This is a nice version of the classic pocket effect, HOT ROD. There have been some really nice metal versions of this over the past 45 years (Sterling Magic Varillium Hot Rod, The Gold-plated Hot Rod that we currently sell...)
Dave Powell put out this version of a gold color metal hot rod, and called it Golden Rod. But apparently he also made some silver rods, because I came across this one. I do not know whether the silver ones are rarer than the gold ones (both are hard-to-find now!), but I have seen a few gold ones over the years and this is the only silver one I have come across.
The effect if you do not know it: Magi shows a beautiful metal rod, embedded with gemstones. The six different stones are on both sides of the rod. One stone is selected, and magically ALL the stones change to that color. No switching of rods. No moving parts. The perfect pocket effect. It can be routined to hand out for examination in the middle, but I personally do not think this is necessary -- the displays and change are so open and natural that pushing the spectator to examine the rod seems like overkill.
No longer sold by Powell, and does not come up on any google search for Golden Rod -- I did find a lot of flowers and fishing poles
Complete with package and instructions, in unused condition