A footnote to what Del said - click Edit on your question, then click Extend Expiry. That''ll maximise your chances of getting a good answer.
[EDIT] @dlashof - considering the dates, one possibility is that the instrument was brought from Europe to the USA by an immigrant - perhaps a refugee - as a personal possession, so the McKinley Tariff Act would presumably not apply. Also, Germany was only divided into East and West in 1949, not 1939. Further, for practical reasons (like being at war), German exports to the USA between 1942 and 1945 were effectively nil.
@Katy, I think we need more information. Does the label say "Made in Germany", or is that your translation? Could you give an exact transcription of all you can read, with dots for the bits you can't. Is it printed, or is some or all of it handwritten? If so, which bits? Can you describe the style of printing or handwriting, so that we can picture it?
Or, even better, could you take a photo of the label, upload it somewhere, and post a link in your AD?
(I suspect that "Antone" actually reads "Antoine", that would tie in with someone making for, or implying a connection with, the French market - just as the French word "copie" does. On the other hand, the German "Anton" is also possible.)
(In context, Becker is claiming to produce a violin in the style of Stradivarius; but I can't tell whether he's boasting of his skill, or simply saying that this is a proper violin not a street fiddle.)
How old does the label look? 20 years old, or 100 years old (browning, ragged at the edges, etc)?
How old does the violin look? Ditto. Just your general impression, does it look shiny and modern, or soft and used like a family heirloom?
In what years (roughly) was your mom playing it, and in what country? Did she tell you any stories about it?
Has your family been in the USA time out of mind? Or, did some of them arrive in the USA from Europe during the late 19th or the 20th centuries? and if so, from where?
Any details could help. Your question is getting intriguing, post some AD.
[EDIT2] @dishlaf. Thanks for the correction on the McKinley Act. I was sure that your 49 was no more than a typo. As regards appearance and condition, I had in mind that they might be some sort of guide, assuming that no-one has deliberately set out to change them. I fully accept that the only way to arrive at some sort of certainty is for a skilled person to examine the instrument itself.