Doing some online research I found a good picture or two but thought there should be more.
I wanted all of them full size, so the full post is here: http://www.modelt.org/mtfcivb/showthread.php/818-1915-1916-Horn-button?p=2884#post2884
Another Canadian amonoly is this horn button stayed on for us until it was moved to the centre of the steering wheel in 1921. Canada continued to use the headlight switch down by the coil box until the combination ignition switch on the dashboard came in. When this came in the horn button moved. The external wires were normally encased in a black cloth hollow "spaghetti" tube to neaten the appearance.
Here is a typical 1923 horn button and steering wheel with the combination switch on the dashboard.
Here are a couple of pics of a NOS one installed.
Steve here are some pics of one taken apart
I should have looked at your link first. You show pics of all the parts. but mine are cleaner .... These little critters are getting hard to find in useable condition... If someone could reproduce the inside pieces (the black button is already in reproduction) then the outside case can be found in used fairly easy. I have several outside shells but no good insides... The one I show above was my last one, and I just traded it to another T owner for his car. But now its where it should be (on the steering column of a 1915)
Wow, a horn button for a whole car, that was quite a trade!
Mark, Ive always been considered a good "horse trader", but not that good. I guess I should add that I traded my horn button for his "APCO" horn button
Make that 1915-16-17 and part of 1918.
That horn button was used through the end of the 1917 model year and a few months into the 1918 model year.
Whew, I guess I dodged that bullet... I was ready to throw my whole car in for that button, but Donnie blinked! (Sorry I ruined your reputation Donnie)... BTW, after an acid scrub and paint, that button looks NOS!
Erik, I always thought the twisty horn/light switch was standard by mid '17...but considering Fords bottomless parts bin, who can say for sure.
Since when was the straight quadrant brass plated?
I have already sent the tin part in for quotes, Bob
That small brass grounding strap shown in Donnie's pictures is often missing from used horn buttons. They need that piece to function properly.
David -- The '15-up-style of steel quadrant was brass plated in very late '14 and early '15. (I don't know when "early '15" ended.)
We make the button only, and it's available from Langs, T-6983.