It’s been a long time since the last wash I have lost count. Must be one year ago. This is S&W white vinegar wash or more of a soak actually. I didn’t scrub or brush it in the vinegar, more of rinsing that’s all. Check the colour of rinse was yellow instead of green. This 1966 model is my favourite 501 for weekend wearing. Its slim silhouette is unlike the 1944 or 1955 model; which is less formal, is great for sport. Worn since 2009. 6 years old. Size 30/32. 9 washes. Inspired by NASA “Spacewalk of Gemini”.