Herring Hall Marvin 3 door safe

[DaddyO2]

I have a 3 door Herring Hall and Marvin safe. The top 2 doors are open and can remove back plate showing tumbler. I cannot figure the combinations out and it does look like they are changeable. I could drill a hole in the back plate of the lock to figure it out but would prefer not to. As you can see the safe doors are numbered from top to bottom 419-420-421. Also stamped just above the dial are the numbers 1132-1133-1134. The bolts on the two locks are numbered 315-top door and 307-middle door.The bottom door is locked, any solution as to opening it? The doors are removable when open. I would also like to figure the weight , I will have to have it moved as I cannot seem to budge it. It is setting on top of a Maximum safe that is in the neighborhood of 1000 to 1300 lbs. I think the age is somewhere in the late 1800's but sure that someone here would have more knowledge than I. I do plan on using it as it does seem secure.
Measurements are 34 3/4 in H x 17 3/4 in W x 23 3/4 in D Top door is 19 7/8 in tall 2 bottom doors are 6 7/8 in tall
Locks are brass. Thickness of doors are 1/2 in steel Thickness of sides are 3/8 in and looks to be 2 pieces sandwiched to 1/2 in. Top and bottom thickness is 1/4 in.
I am trying to put as much information as I can. There are NO patent numbers that I can find and have listed above the only numbers that I can find.
Also, It looks as to have had keyed day locks? that the internals have been removed.
I hope my pics come out OK. I could get not a good pic of dial but it does say Herring Hall Marvin Safe Co,Hamilton Ohio.

Thanks