The Albany Foundry began in 1897 after the Civil War.
From 1900-1903, they were manufacturers & dealers of stoves
Then, the Albany Foundry expanded their product line
to include other Cast Iron Items:
They published catalogs and took orders for the above.
You could order Doorstops --- Painted or Unpainted
In their 1926 Catalog, they gave precise instructions on
" How to Paint a Iron Casting "
To see Albany's Painting Instructions supplied with that catalog. Click Here
They would also make castings per your sketch or model.
When in 1932, the Island of VanRensselaer was incorported into thr Port of Albany,
the Albany Foundry closed.
MARKING STYLE :
1. Sometimes they put a "Typewritten Style" Number using 1,   2   or   3   Digits
See Picture " M1"
2. Sometimes they put their name on the back:   "ALBANY FDY CO" Along with a Number
See Picture   " M2"   &   "M3"