Model 139: presumably the redesignation of the former Model 123 after modification as XB-10 prototype of the B-10 series.
Model 139A: high speed bomber for U.S. Army Air Corps (YB-10), first production version of the Model 123 prototype; 14 built (1934). Model 139B: a single prototype designated YB-10A (1934) and probably also the B-10B main production version, 105 built (1934-36).
Other variants included the B-10M and B-10AM (conversions), the YB-12 (seven built in 1934), the YB-12A (25 built in 1935), the B-12AM (conversions) and three prototypes : the XB-14 (1935), the A-15 attack/bomber variant and the O-45 observation/bomber (both in 1937). The B-13 variant was not built.
Model 158: 70,000 lb land transport (as opposed to flying boat) airliner project for TWA (1938). Not built.
The illustration below, taken from a 1938 patent, is reminiscent of the general characteristic of the Lockheed Constellation (TWA's eventual choice), and therefore most likely depicts the Model 158 project.
Very good work my friend. You're right when a draft is necessary (if possible) to show his picture or drawing.
I will also do so.
Martin Model 159---competitior of the XOSN-1, XOSS-1 and XOS2U-1.
- U.S. Navy XPBM-1 experimental patrol bomber flying boat prototype; one built (1939).
- Same aircraft modified as XPBM-1A for armament experiments (1941).
- U.S. Navy PBM-1 twin engine patrol bomber flying boat; twenty built (1941).
- U.S. Navy XPBM-2 experimental patrol bomber flying boat prototype with extra fuel capacity and provisions for catapult launching; one built (1941).
- U.S. Navy PBM-3 twin engine patrol bomber flying boat; 32 built (1942).
- One modified as XPBM-3E for AN/APS-15 radar development.
- U.S. Navy PBM-3R transport version with strengthened floor, passenger seating, and removed armament; 18 built (1942).
- U.S. Navy PBM-3C twin-engine patrol bomber flying boat with increased defensive armament, improved crew protection and added AN/APS-15 radar; 274 built (1943).
- One modified as XPBM-3D, prototype for the PBM-3D variant, utilizing upgraded engines and additional armament.
- One modified as XPBM-3S prototype for the PBM-3S variant.
- U.S. Navy PBM-3S anti-submarine warfare variant stripped for longer range, with fixed gun mounts and downrgraded armament (1943).
- Royal Air Force « Mariner I » or Mariner GR. Mk.1A; 32 built, never used operationally; some returned to the U.S Navy.
- U.S. Navy PBM-3B, former RAF Mariners after their return to the United States.
- U.S. Navy XPBM-5 prototypes to evaluate new uprated engines and Hamilton Standard 3-bladed propellers; two built (1944).
- U.S. Navy PBM-5 improved version incorporating new Jet Assisted Take Off (JATO) bottles mounted on both sides of the aft fuselage; 628 built (1944).
- U.S. Navy XPBM-5A prototype with retractable tricycle landing gear; one built (1945).
- U.S. Navy PBM-5A amphibian version (only one in the series); 36 built and 4 Model 162F brought to "G" standard (1945).
Model 167: experimental twin-engine attack bomber designed by James S. McDonnell and competing against the Douglas DB-7 and the Stearman X-100 (U.S.A.A.C.'s Circular Proposal 39-460); one built (1939).
Model 167F/167B Maryland: twin-engine attack bomber for export.
- 115 Model 167-F1 aircraft for France and designated there as Martin 167-A3 (1939)
- 100 Model 167-F2 aircraft for France and designated there as Martin 167-A3 (1940)
- 95 Model 167-F3 aircraft for France (armor-plated variant), many of which were diverted to RAF as Maryland I (Model 167-B3) and given British controls and instruments (1940).
- 150 Model 167-F4 aircraft for France (self-sealing fuel cells), all delivered to Britain as Maryland II (Model 167-B4) (1941).
- U.S. Navy JRM-2 variant with Pratt & Whitney engines instead of the JRM-1's Wrights; gross weight increased by 20,000 lbs; one built (1948).
- U.S. Navy JRM-3 with uprated Pratt Wasp Major "Corncob" engines (modification of all four remaining Model 170A aircraft).