The Sinfoniëtta, op. 32, is certainly a fine work by the too much underrated Johan Wagenaar (1862-1941). I have it on a Et'cetera CD. The four movement piece is dedicated to the University of the city of Utrecht on the occasion of his receiving his honorary doctorate (source: booklet notes). Some connoisseurs think it's Wagenaar's best orchestral work, but my favourite has always been Levenszomer (Summer of Life), a fantasy for orchestra, op. 21.