The blocks were cast by a machine called a ‘Rockcrete’ at the company's Frankton factory in Hamilton.
Today Firth has a team of about 650 people, working in more than 65 plant sites throughout New Zealand.
Firth produces: masonry blocks, pavers, retaining wall products and bricks.
Dricon has been in operation in New Zealand for over 40 years and the business is ISO 9001 Quality Certified.
Dricon's products include: HandiCrete, RapidSet SuperSet and Oxitone, PaveLock, PaveSandTM