The SW99 rendition of the popular Walther P99 was the product of a joint collaboration between Smith & Wesson and Walther . The modified receiver used in the SW99 is supplied by Walther and is manufactured in Germany. Smith & Wesson manufactures the slide and barrel of the SW99 in the United States. Though there are slight variations in aesthetic design, the function of the SW99 is identical to its German-made counterpart. 
einszett was founded in 1936 in the city of Köln (Cologne) , Germany by Werner Sauer Sr. who believed it was possible to create a better polish than what was currently available.Mr. Sauer stood apart from his competitors based on a simple philosophy that remains until this day: produce a premium quality formula without compromises and offer excellent service. Mr. Sauer named his successful formula einszett (translated as "1Z") based on the number-letter designation assigned to car license plates registered in Köln.