Good afternoon, Chijioke,
Thank you for submitting photographs of your item for valuation through MEARTO.
1781 refers to the model number of your clock; it is an early 20th Century clock. While it retains its original leather case, from the photos it appears as though the brass casing of the clock is heavily corroded, which negatively impacts the value of the clock. If it can be cleaned it would be worth a little more - maybe $100-150 - so unless you can have it cleaned very inexpensively it may not be fiscally prudent to undertake the cost of cleaning it.
I hope this information has been useful to you; please let us know if we can be of additional assistance.