How old and what value is my John Brinsmead and sons piano serial 65105?

Your John Brinsmead and Sons piano with serial number 65105 was likely manufactured around the late 19th to early 20th century, making it approximately 100 to 130 years old. The value of such a piano can vary significantly based on its condition, historical significance, and market demand, but it could range from a few hundred to a couple of thousand dollars. For a more accurate appraisal, it's best to consult a professional piano technician or appraiser.