3 1/2" X 4 3/8" (86mm X 107mm)

No markings

Picture courtesy Bob Scafe

3 1/2" X 4 1/4" (86mm X 104mm)

(skirt inkstamp) IND. URUG. / AFE 1987

{AFE is for the Assn. Ferroviaria del Estado}

Picture courtesy Bob Scafe

3 1/2" X 4 1/4" (86mm X 104mm)

(skirt inkstamp) C???? / IND. URUG /1984 / AFE

{AFE is for the Assn. Ferroviaria del Estado}

Picture courtesy Bob Scafe