and, sorry, can't help it... the Boeings don't "come from" Boeing field, they come from Paine
You sort of have me there. I've spent a lot of time at North Boeing Field. The Seattle Delivery Center has delivered more than 12,000 commercial airplanes from Boeing Field since the first Boeing 707 was delivered in 1958. It's where they "hand over the keys" to customers.
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