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Another conference has been commemorated by an Australian stamp issued on February 26 last, the Sixth Biennial Conference of the International Association of Ports and Harbours, the venue being the Southern Cross Hotel, Melbourne, from March 3-8, which had a temporary post office established and a special conference postmark. The stamp design shows a Melbourne harbour scene with ships and a tug and the city skyline in the background. The tug on the left is the Walumba; the ship in the middle is the Celtic Monarch; and the ship on the right with the bow showing is the City of Ottawa.
The Celtic Monarch was built in 1957 by Bartram and Sons, Ltd., at Sunderland, for the Monarch Steamship Co. Ltd. (Raeburn and Verel, Ltd.) and has a gross tonnage of 7,777 with a net of 4,528, and dimensions, of 453.9 x 58.8 x 27.7 ft. A single screw motorship with a Kincaid-B. and W. oil engine developing 4,500 b.h.p. she has a speed of 12 knots. The machinery was supplied by J. G. Kincaid and Co. Ltd., of Greenock. In July 1964, the Celtic Monarch was sold to Mullion and Co. Ltd., of Hong Kong, who renamed her Ardmarie. She was again sold in 1967 to the Ribot Shipping Co., Ltd., of Gibraltar and was renamed Ribot.

Sea Breezes June 1969

Australia SG438

After completing was she managed by Raeburn & Verel Ltd., and used for tramping worldwide.
1960 Managed by Harrisons (Clyde) Ltd., Glasgow.
1964 Sold to Mullion & Co. Ltd, Hong Kong, renamed in ARDMARIE, under British flag and port of registry Glasgow.
1967 Sold to Ribot Shipping Co. Ltd, Gibraltar, renamed RIBOT (most probably she is under this name on the stamp.)
1971 Sold to Amazon Shipping Corp., Liberia, managed by N&J Vlassopulos Ltd., London, renamed MONTANA.
1973 Sold to Tridentco Shipping Ltd., Famagusta, Cyprus, managed by Five Continents Navigation Ltd., London and renamed SOVEREIGN GRACE.
1977 Renamed in GRACE.
The same year sold to Tetarti Cia Nav. S.A. , Piraeus.
13 July 1978 she collided with the ARYA TAJ in Brunsbuttel Roads (Kiel Canal), and sustained severe damage forward. She was discharged and declared CTL.
Sold to Eisen & Metall AG, Hamburg for breaking up, arrived Hamburg 18 July 1978.
She was resold to Spanish breakers.
23 Feb. 1979 she left under tow of the tug CARIBIC from Hamburg bound for Leixoes, Spain, but during the voyage she sank on 01 March 1979 in route to the Spanish breakers in position 46 21N and 07 51W in the Gulf of Biscay.