RobertMG
Concurrency of US 206 and 209 is controversial.  See https://www.usends.com/milford.html .  Expect signage to vary regarding understandings of US 206.  The portion on E. Harford St. was de-designated as part of US 206 in 1946.  Signage in this portion is by Pennsylvania Dept. of Transportation.  The portion of the present road between Metz Rd. and Harford St. (spanning Sawkill) was built in the 1950s along with the current Milford-Montague Br., and was never officially designated as part of US 206, although it replaces a part of pre-1946 US 206 and 209.