Stockpile of completed Dolos breakwater blocks Photographer: William Martinson - 2014

Steel formwork for Dolos breakwater block Photographer: William Martinson - 2014

Detail of tapered hammered-in locking wedges to securely join sections of steel formwork Photographer: William Martinson - 2014

Formwork for three Dolos breakwater blocks Photographer: William Martinson - 2014

Formwork for three Dolos breakwater blocks Photographer: William Martinson - 2014

Stockpile of completed Dolos breakwater blocks Photographer: William Martinson - 2014

Dolos casting yard stockpile and crane photographed from a boat on the Buffalo River Photographer: William Martinson – 2020

Removing the reusable steel mould from a Dolos, East London harbour, 1965 Submitted by Caesar Merrifield via William MARTINSON Photographer: E. M. Merrifield - 1965

Removing the reusable steel mould from a Dolos, showing the ease at which the formwork is dismantled, East London harbour, 1965 Submitted by Caesar Merrifield via William MARTINSON Photographer: E. M. Merrifield - 1965

~Article announcing manufacture Source: DRISA South African Railways and Harbours Magazine. Volume 69 (JApril 1964) p.411 Photographer: Unidentified

Article announcing manufacture (2nd page) Source: DRISA South African Railways and Harbours Magazine. Volume 69 (JApril 1964) p.412 Photographer: None