Initially, these aircraft were to be given USAAC serials 39-618 to 39-687 however, delays with the actual purchase the serials numbers were changed to 40-696 to 40-702.
These aircraft were to be given USAAC serials 39-618 to 39-687 however. This was initially.39-618 to 39-687 however was delays with the actual purchase the serials numbers were changed to 40-696 to 40-702.