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Send checks to MOSSO at PO Box 230246 Boston, MA 02123

MOSSO is a 501(c)(3) not-for-profit organization. Contributions to MOSSO are tax-deductible to the extent provided by law.

We'll seat you onstage next to a musician during an upcoming performance! After making your donation of $500 or more, just let us know in “Additional Information” which performance at 52 Sumner you’d like to participate in.

And you'll even get applause for playing a role in bringing professional quality chamber music to Western Massachusetts!