The couple's original focus had been first period Worcester but soon moved to 20th century English ceramics like Doulton, Worcester and Wedgwood with a particular emphasis on individual designers such as Keith Murray, John Skeaping, Charles Noke, the Barlow sisters and Makeig-Jones.
Mossgreen will auction the collection on February 13 at their room in Armadale.
Lachlan's pottery interests encompassed post Second World War Australian studio potters, of which he was a patron, and eventually he turned his hand to the craft – building a full studio with wheels and kiln on their Yea property.
The auction contains a comprehensive collection of Royal Doulton flambé examples from the 1920s and 1930s including a 'Blossom' vase by Noke and an owl by Alan Maslankowski.
Noke also features with a set of eight 1920s Royal Doulton Sung 'Firebird' flambé plaques and a stem vase from the same period.
Other Royal Doulton attractions include a 1930s porcelain tea service, a Chinese jade lidded bowl and a pair of early 1900s Harry Allen titanian peacock vases.
Animals also are prominent with Royal Doulton porcelain foxes, cat, tiger, elephant and dragon all part of the mix – along with a collection of Wedgwood figures.
Collectors should be drawn to a range of early 20th century Wedgwood plates and Royal Worcester Australian bird plates.
The auction contains quality antique furniture including an 1815 Regency mahogany sideboard, a 19th century colonial Dutch court cabinet and a four-door Neo-Gothic arts and crafts bookcase originally commissioned for Werribee mansion by the Chirnside family.