Mowbray Collectables’ postal stamp Auction 600 is scheduled to close on 3 November 2026. Its catalogue lists 3,296 lots, beginning with collections and accumulations and extending through New Zealand, Australia, Pacific islands and other countries.

New Zealand postal history occupies lots 357–473 and postal stationery 474–500. Definitives follow at 501–956, with separate sections for airmail, commemoratives, health stamps, officials, life-insurance stamps, postal fiscals, booklets, revenues and cinderellas. The catalogue also allocates lots 1736–1778 to polar material, 1779–1796 to flight covers, 1797–1877 to Australia and 1878–2262 to Pacific islands.

Bidding is available by mail, telephone, fax, email or the auction website. The catalogue says bids below two-thirds of estimate are generally not considered; its conditions allow reserves generally ranging from 65 to 80 per cent of estimate. New Zealand bidders have 15 per cent GST added to successful bids. Lots can be viewed by appointment at the firm’s Otaki offices.