FN Browning Trombone, .22 long rifle cal. slide action rifle.   Serial #143578, mfg. 1972 by Fabrique Nationale in Belgium.  Excellent condition.  22” barrel has excellent bore, white bead front sight and adjustable rear.  Barrel and receiver have 98% blue with light handling marks on left top of receiver.  Stock and forearm of light French walnut have near 100% finish.  Steel butt plate.  Slide action works perfectly.  Beautifully made, deluxe pump .22! Hard item to find! Never commercially available in the U.S. - most came over with troops or in small import allotments.