What is the value of an autoharp manufactured at Phonoharp Co from East Boston Massachusetts 1412?

The value of an autoharp manufactured by Phonoharp Co. from East Boston, Massachusetts, in 1412 (assuming you meant a model from the early 20th century, as the company was founded in the 1880s) can vary significantly based on its condition, rarity, and demand among collectors. Generally, vintage autoharps can range from $100 to several hundred dollars, with well-preserved or rare models potentially fetching higher prices. To obtain an accurate valuation, it's advisable to consult with a musical instrument appraiser or check online marketplaces for similar items.