The calculator was tentatively ID'ed on the GBFans forums by someone called gboy6 back in January 2013, in a thread simply titled "Small calculator".
I put the make into my Followed Searches on eBay and never got any hits. Then one day, I got three. One was a Buy It Now for $50, one was a BIN for just over $30, and one was an auction that someone had already bid up higher than $50. I never understand why people do that. If there's another, seemingly identical one, that you could BUY for $50, why drive your price up?
I did the BIN and got the cheapest one, since I wasn't 100% convinced it was the correct model. But after holding it in my hand and re-watching the Blu-Ray of the movie instead of looking at still frame reference pics, I'm very pleased with it. It really looks correct.
I think the $50 one is still on eBay right now.
~~~
The photo with the horses was ID'ed by someone else on the GBFans forums named RedDeath, back in August of 2010. I myself didn't uncover that little tidbit until Christmas Day of 2012. I did a reverse image search and came across the BIG version at the Firehouse 23 site, and then noticed that the two smaller pics in an early scene were also on that site.
Engine Company No. 23 and Truck Company No. 5
As for the frames, I am not sure what they used. They look very simple. I need to have some other stuff framed anyway. My GB1 one-sheet poster, now signed by Aykroyd, is just slightly larger than the biggest poster frame Wal-Mart had. The poster is 27-1/4" wide and 41" tall. The frame was 27x40.
So I'll probably get them all custom-done.
Alex