A few years back, I successfully led a crowdfunding effort to raise £975 to purchase scans of the 1970s / 1980s 1:50k topographic map series of South West Africa / Namibia from a commercial map archive. It was a great success and I put them online: https://namibia-topo.openstreetmap.org.za/
Recently I have been speaking to the archive again about purchasing similar map series for other African countries. The map series vary per country from the 1960s to 1990s. Many were created with support from the United Kingdom’s former Directorate of Overseas Surveys (DOS).
The 1991 1:50k Topographic series of Swaziland (now Eswatini) published by the Swaziland’s Surveyor General is available. It is made up of 31 sheets in total. The scans are supplied clipped and unclipped. Total price is US$ 400 for the scans.
It would be fantastic to get these maps online. Would you be willing to support this purchase?
Link: Worldcat reference for the 1991 Swaziland map series.
Example of the join between 4 cropped sheets:
