c1988 steel Air-King-Date model 5700N on Oyster bracelet with blue dial. Has had a movement service and new glass in February 2009. This is quite a collectible model, but does not feature a quick-set date function, i.e. in a month with fewer than 31 days you have to turn the hands through 24 hours a sufficient number of times to correct the date. New Air-Kings today start at £2,610!