wrote in message
1950s brick with plaster walls could easily be a Real Brick house (no stud
cavities)- they were still being built in that era. OP's comment that the
lather may be directly on the brick or block would tend to support that
idea.

MDB, please enlighten us- Stick frame or masonry walls?

aem sends...

When the OP said real brick, I though it was like my last house, masonry
walls. Stick frame would be a facade only. The real brick did not leave
much room for insulation.