The Quality Music String Co. Inc

About

I was unable to source any information about the company 

Employees

Bertha "Bertte" Sofo, was a secretary with the company in 1940 [1]. A public notice of a marriage between her and  businessman William Hauser, in 1946, listed her as an "exec" at the company [2].

Sources

[1] https://www.familysearch.org/ark:/61903/3:1:3QS7-89MB-PPRP?i=3&personaUrl=%2Fark%3A%2F61903%2F1%3A1%3AKW1X-1MQ

[2] https://books.google.com/books?id=LRoEAAAAMBAJ&pg=PT23&lpg=PT23&dq=%22quality+music+string%22&source=bl&ots=nTvo4rErNN&sig=ACfU3U0M2Tx9LplrK_k1kgPj3a7YN72VwQ&hl=en&sa=X&ved=2ahUKEwj5n7-Tt7joAhVOaM0KHeqZA74Q6AEwA3oECAoQAQ#v=onepage&q=%22quality%20music%20string%22&f=false