DMV = Department of Motor Vehicles, the number is likely a sequential number that they handed out. In short, it's nothing fancy and is likely a state issued number.
As far as the block, and that raised pad area, it's an early 32' B style block. The pad was supposedly for some sort of brake system servo or assist that never made it into production. Again, nothing is rare or desirable about this feature.
DMV = Department of Motor Vehicles, the number is likely a sequential number that they handed out. In short, it's nothing fancy and is likely a state issued number.
As far as the block, and that raised pad area, it's an early 32' B style block. The pad was supposedly for some sort of brake system servo or assist that never made it into production. Again, nothing is rare or desirable about this feature.