1933 National Graflex Series I is an early SLR for 2 1/4 X
2 1/2 on 120 rollfilm. This Series I version is distinguished
from the Series II by not having a sliding cover on the ruby window and
the mirror set lever is on the operators right instead of left.
I'm pretty sure my father gave this to me but neither of us remembers
exactly. I know somebody gave it to me