Men's shoe maker Weyco Group Inc yesterday said net sales for the first quarter of 2002 edged up 1 per cent to $35.72m compared to $35.35m for the same period in 2001. Net earnings for the first quarter ending 31 March 2002 were $2.27m, down 3 per cent from 2001 net earnings of $2.34m. Diluted earnings per share were $.60 in 2002 as compared with $.59 in 2001.