Focus on Family Group (Moore) and explain the Reception.
The first bronze, for Barclay School, was cast at the Fiorini Art Bronze Foundry in London, using a lost wax process to cast sections of the work which were then assembled.  The large sculpture tested their facilities, and took nearly a year to complete.  It was installed in Stevenage in 1949.  Local opinion was not uniformly positive: a local postman was quoted as saying it resembled something from Belsen. (A similarly unflattering comparison was made to his Reclining Figure: Festival, exhibited at the Festival of Britain in 1951.)
Meanwhile, two bronze copies were cast by Fonderie Rudier, in Paris, using a sand casting method.  Both were bought by Moore's preferred art dealer in New York, Curt Valentin, and one was quickly sold to the Museum of Modern Art in New York.  MOMA had housed Moore's Recumbent Figure 1938 during the Second World War, where it had been for an exhibition, before it returned to the UK.  Family Group went on display at MOMA in February 1951.  After discussions with John Rothenstein at the Tate Gallery, and an approach from Nelson Rockefeller who also wanted a copy, Moore sold one copy to Rockefeller, and asked Fonderie Rudier to make a third bronze in 1951; the third Rudier bronze was acquired by the Tate, and included in a solo exhibition there in May 1951.  The foundry also made a fourth bronze, as an artist's copy.
Moore made several similar works, including a stone sculpture for Harlow in 1954, his Harlow Family Group (LH 364).A second artist’s copy was cast by the Morris Singer Foundry in 1992, which is held by the Henry Moore Foundation, bringing Family Group up to an edition of 4 + 2 (four casts plus two artist's copies).  Three of the five (4 + 1) original 1950s castings remain with their original owners: Barclay School, the Tate, and MOMA.  Rockefeller's copy is now at the Hakone Open-Air Museum in Japan, and Moore's original artist's copy is now owned by the Norton Simon Museum in Pasadena.
The model in Stevenage was originally displayed outdoors, and remained beside a curved curtain wall outside the school's entrance for 60 years.  It became a Grade II listed building in 1993.  After an unsuccessful attempt to steal the sculpture in May 2010, it was moved to a more secure place inside to the school's reception area.
Fiorini Art Bronze Foundry Nelson Rockefeller John Rothenstein Barclay School Hakone Open-Air Museum Henry Moore Foundation listed building Henry Moore Tate curtain wall Festival of Britain Reclining Figure: Festival Tate Gallery Curt Valentin Morris Singer Belsen Recumbent Figure 1938 Stevenage lost wax sand casting Museum of Modern Art Norton Simon Museum