A friend of mine has an Ideal grade with many upgrades that was his grandfather's. The gun has polished silver on the triggergard,lever and the sling bracket on the barrel. The triggers and safety swith are gold. the gun is a 1920 model and has still has most of the case color remaining. My question is, are these upgrades factory and how common are they if they are factory? The wood in this gun is beautiful. Thanks, Tom