Airship Construction Photo - 1925

Original 9x7" b&w photo of the inside of an airship hangar at the beginning of construction. Text in the negative along the botom margin reads" R5-1-37 Preliminary Layout 'A' Frames Along Crib 2/21/25". I am unable to identify the ship or the hangar but I bet some of you experts can do so. Excellent. No marks on the reverse.