It's an LRV (Leisure Recreational Vehicles) circa 1979. They went out of business around that time (79-80). Chuck? Robinson was a part of LRV prior to starting his own company.
This is a personal and sentamental favorite and is current residing in bubble wrap until I get the right parts put together. As for the chain ring and crankset, it came with the frame and will likely be swapped out in favor of something else.
TCN