On 18 Mar 2007 15:24:35 -0700, "Bret Ludwig"
wrote:

Also this is not a common piece at all-it has to be late 1920s
construction. snip

Late '20s-early '30s in design, bu that particular specimen was built
in 1947. The stenciling on a component inside is the giveaway there,
UNLESS that particular compoenent inside was changed out at some time.

All WECO gear had date and plant codes well into the '70s that
consisted of the month, a single letter denoting which plant (V was
Virginia Works, O was Oklahoma City, M was Merrimack Valley, etc) and
the last two digits of the year.

Thus, this stenciling of 5V47 meant the particular piece was made in
April, 1947 at WECO's Virginia Works.

The later poster is confusing this with the AC powered
metal case 19C, I think, which was thick on the land until orientals
started buying them for their not very good transformers. snip

The 19C was central office test equipment, usually, but also had a
portable version. The 11A was designed to be a lineman's portable,
but was also found in considerable numbers inside many toll offices
for decades.