I bought this off ebay and it was listed a being a vintage coticule. The bottom is a reddish brown colour; not blue like that of typical natural combo cotis. The 'coti' side has little specks. It kind of reminds me of a Jnat. It measured 2 1/8" x 2 3/4" and is 1/2" thick. The coti is kind of greyish in colour. What do you guys think?