Across the wider Richmond service area, houses span a long stretch, 1959 to 1988, with a median around 1971. Winchester sits a little later than that median - most of the housing here went up closer to 1974, which puts a lot of garages on the tail end of the steel-door transition and the start of lighter, cheaper torsion setups that builders leaned on through the rest of the decade. That three-year gap matters more than it sounds like. A 1971 door and a 1974 door can use different spring winding cones, different track gauges, and different bracket spacing, and if you grab a part sized for the wrong year, it binds. We don't assume Winchester matches the rest of the coverage area, because it doesn't exactly. We're coming from Richmond, 20 miles off, so before a truck rolls we want to know roughly when the house was built, not just that it's "older." That one detail changes which springs and rollers go on the truck.