On a watch marked solid gold; should the plate that is inside and just covers the movement also be solid gold? To make sure I'm reading this right, There's an "eagle" and an "18". I assume the mark that is supposed to be an eagle but it looks more like a squirrel and the 18 at the top indicate this should be solid 18K right? There's another thread about the eagle squirrel, several years old. I believe most people thought it was fake and considering the gold level that I found.... I did a non-destructive gold test and it showed around 10K. Once that was so low I decided to double check with a scratch/acid test on the inside cover and it went through to copper very quickly like plate. It also indicated 10K or less.