There were 2 XP6M-1 prototypes, both crashed. There were 6 pre-production YP6M-1s, 4 of which served together with 3 production P6M-2s on a single US Navy squadron.
Glenn L Martin Aircraft started up in 1912; Consolidated not until 11 years later and Vultee, who joined with them to form Convair in 1943, didn't start life until 1932.