Disclaimer This blog is about the graphic design of burglar alarms and has no connection with the companies featured. Most photos show vintage sounders and are not the latest products of the firms under discussion. For up-to-date info on any company, please visit their official website.
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- Chris H on NSIN, Oxford: catchy
- Richard on Xtal, Merton: crystal
- vicimacdonald on NSIN, Oxford: catchy
- Dan on NSIN, Oxford: catchy
- ISS on Security Red Alert, Lambeth: wiring
- Stuart on Security Red Alert, Lambeth: wiring
- ISS on Security Red Alert, Lambeth: wiring
- Vici MacDonald on Western Technologies, Brighton: big W
- Vici MacDonald on Western Technologies, Brighton: big W
- Stuart on Western Technologies, Brighton: big W


SGD stands for Stuart Dickie (not sure of his middle name). Company based in Cardiff. This is a takeover of another Welsh firms contracts CDS
Hi: SGD is a Welsh company, don’t know who put that up but it’s not to their usual standard on a takeover.
I assume part of a buying group ?
What was special about the H type and C type boxes with the rounded corners?
I’ve only ever seen larger companies use them.