This house was on Highway 330 above upper mill bridge (left side), between the 3rd (649 Valley Rd) and 5th (695 Valley Rd) houses above bridge. No current houses numbers in that range were built before 1950.
House location approximated based on this range.
"That portion of Brooktondale Rd (Rte. 330) from the lower bridge in Brooktondale to the intersection of the Boiceville (West Slaterville) Rd. will become Valley Rd." See "Easy St to Be No More," Ithaca Journal, October 17, 1957, 5.