1395.00 Colt 1877 Thunderer Project Winnipeg May 20, 2024 - 2:04 PM Menno Colt 1877 Thunderer in 41 Long Colt caliber. 3.5" barrel, 6 shot. Frame and trigger guard serial numbers match and date it to 1888 production. Single and double action working but timing and lockup poor and cylinder doesn't stay in lockup.