Block plane sold under the Craftsman (Sears) brand, probable Sargent manufacture.
The lever cap is marked C331; the iron carries a clear Craftsman stamp and appears original. The model is undocumented — C331 identifies the lever cap, not a specific plane type. Attribution to Sargent is medium confidence.
In the collection
Acquired in a lot of four block planes in 2024 — together with Stanley No. 19 Sweetheart, No. 60½ and No. 9½.