Tiffany & Co. Mantle Clock

I purchased this clock at a estate sale. I do not know the year it was made or any history. All the info i know is that it is a "Tiffany & Co, New York". Inside of the clock, it has the numbers "2770". Ive tried to take it to local shops in my area to get this appraise but no one seems to know the value of the clock. If anyone knows how much this clock is worth, please let me know. Thanks!!!