SEVENTH AMENDMENT TO HARLEYSVILLE MUTUAL INSURANCE COMPANY HURON INSURANCE COMPANY HARLEYSVILLE INSURANCE COMPANY OF NEW JERSEY HARLEYSVILLE-ATLANTIC INSURANCE COMPANY WORCESTER INSURANCE COMPANY MID-AMERICA INSURANCE COMPANY NEW YORK CASUALTY...Proportional Reinsurance Agreement • March 27th, 1996 • Harleysville Group Inc • Fire, marine & casualty insurance
