Question: Where did the company expand that produced 40 million varieties of watches?
Sentence (from "Waltham Watch Company"): The Waltham Watch Company, also known as the American Waltham Watch Co. and the American Watch Co., produced about 40 million watches, clocks, speedometers, compasses, time fuses, and other precision instruments between 1850 and 1957.
Relevant evidence: Yes