Antique Cash Register: National model 852-E-XX

This cash register appears to be from the 20's or 30's.  Solidly built and very heavy.  Don't know anything else about it - we acquired it from a family friend who was moving.   Wood base and metal top both are in very good condition appearance-wise.  Machine functions, but can't tell if all functions work.  Has some keys, but not all.

Item is very heavy - feels like close to 200 pounds - always takes 2 people to move it.  In the San Francisco Bay Area, we could arrange for pick up or drop off.  Outside of that, buyer pays for shipping.