Post-1924 Dumoulin Lambert

Note the 'LD' in an oval maker's mark. 28g 2 1/2" chamber. 1. Small g = 1928 dateletter of control (not necessarily date of manufacture) 2. 29-56 = gauge and case length 3. 1.139 Kg = 2.51 lb barrels 4. 13.9 mm = .547" (used 1924-1968) 5. 29-56 in an Omega lying (1924 to current)