EXHIBIT 4.1 RIGHTS AGREEMENT RIGHTS AGREEMENT, dated as of January 22, 1997, between SIS Bancorp, Inc., a Massachusetts corporation (the "Company"), and ChaseMellon Shareholder Services, L.L.C., a New Jersey limited liability company (the "Rights...Rights Agreement • January 23rd, 1997 • Sis Bancorp Inc • Savings institutions, not federally chartered • Massachusetts
