Stanley #12 1/2 with #28-035 Refinishing Scraper Blade
The original blades for the 12 1/2 are hard to find and most people cut down an old saw blade to fit. The Stanley #28-035 Refinishing Scraper is slightly larger (3inX5in) than the opening on my 12 1/2. I took off ~1/8in of the width with a grinder and evened it up with a file. Good for another 50 years.