Thanks! I’m very happy to have those devices in my collection.
I’ve been concentrating my collection on Canadian-specific devices and am particularly interested in bilingual devices as they represent what I typically see in my area; they just tend to be harder to come by. The Edwards 274-315 is perhaps the coolest device I received; the “basic” 274 (single-action with English lettering) is already a rather uncommon device, so I’m ecstatic to have this rarer “fully loaded” example. I’m also very happy to have an older bilingual Simplex T-bar, which was a device I had been looking to add to my collection for quite a while.
Regarding the 202-8A-001 strobe, I regularly see examples of these devices with the brand on the front plate for sale online (and have seen some in person at my high school); they just seem to be a bit less common as I don’t believe they were in production for very long. This one is from 1995, and I previously owned a model from 1996 (202-8A-T) which did not feature branding, suggesting that the change occurred around that time. While I’ve only ever seen EST-branded examples, I wouldn’t be surprised if they were also sold with Edwards and Mirtone branding.
It is indeed interesting to see the differences between the first four pull stations. Despite the fact that they use the same basic design, those pull stations all feel unique when I hold or activate them. Variations between similar devices are one of the first things I noticed when I first became interested in fire alarms and remain one of my favourite aspects of the hobby—it’s always fun to discover new varieties that I had never seen.