Estate sale purchase- I box of other items. This apparently is very high quality. All brushed brass. Never had a wire attached. In new condition. Look closely at the pictures- All pictures.  I am not sure of its use. Not the floor or it would not have the dome ( I think)
Not outside, or it would have a flap closure. Explosion proof ??  It is 1 7/8" from base to top of dome. The large flat flange is 3 1/8" 
diameter. the dome unscrews and has a 1 5/8" diameter. Top of the dome has a center hole with a rubber gasket inserted. This hole 
is approx, .5" diameter.  Inside the dome are the numbers 979008 embossed in the brass. The actual plug is stamped HUBBELL  125v
15 A
  It weighs in at 13 oz.    Ship weight 1 lb.
 If you are considering purchasing this--- You know what it is, and what it is worth- Because I do not.
BIN $ 17.75          S&H $ Calculated by Buyers Zip
Thank You For looking
    GOD BLESS
        HDR