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Nana Ivarsson is Lars Ivarsson's second daughter and Sixten Ivarsson's granddaughter; according to 2010 records she produces about 70 pipes a year. The pipes carry the same round stamp as her father's, with the cursive initials "NI" added. The last two digits of the number give the year of production (07 = 2007), while the first two digits give the production order within that year; on early stamps the date is set inside a circle.