Recently I acquired an 8.5" Chelsea Special Dial Mahogany and Metal clock (photo attached). S/N 15021dates the clock to 1904. This early clock has enlarged hands which I think were only available during early production years. Does anyone have a better idea of the years when available? I've found two other Chelsea examples with the enlarged hands. Both are early (S/N 11778 and S/N 15230). Interestingly, all three of these examples are 8.5" M & M. So I wonder if the enlarged hands were limited to this model and size or were available on other sizes and/or models. Any information would be much appreciated.