I believe it's the SL72. When I looked up the model number, it was SL72. It's shown in the photos, so please check before purchasing. The rubber on the sole may have hardened somewhat, but it still grips when rubbed on the floor, so I think it's fine for everyday wear. Since it's old, I cannot guarantee against tears or other damage. I bought it used and have been displaying it. For display as a collectible, etc.