For those who decided to "play at home" but not enter, here are the answers to the Summer Quiz:

1. 3717

2. 3786

3. 3531

4. 3714

5. 3536

6. 5251

7. 3707

8. 3253

9. 5442

10. 5001

Other than one wrong guess each on numbers 3 and 6, the incorrect answers were clustered on numbers 7, 8, and 10.

7, admittedly not a great picture of the 3707 GST Chrono, gave the most trouble. I also gave credit for 3727, because as far as I know it could not be told apart from 3707 based on the picture presented. One incorrect guess for 3227 (which is clearly engraved "Ingenieur" on the reverse), one guess for 3537 (which has a different configuration of crowns and pushers), and one person gave up on this one.

8 (the Mark XV) drew two guesses for 3241 Mark XII. While the backs are similar, a major difference is the construction of the bracelet and its attachment to the end piece.

10 was a 5001. Incorrect guesses were 5044, 5000, and one questioned how to tell it apart from the 5022/5023 Portuguese Perpetuals. The key was that the number of jewels (44) was shown in the picture, though not easy to see. 5000 had 42 jewels, and I think the Perpetuals all have 62.

Amazingly good scores by all who played:

Entrant.......................................................Correct Answers

KS LOW.......................................................10
TIARK..........................................................10
SHING..........................................................10
LEOSWEENEYPOD…………..……...............10
WAIMAR…….……….........................…….….10
RC30………………………………....................10
ALAN ROSS & BILL B…….............................9
ERWIN……………………………......................8
DMATH………..……………….........................7
ABS0…………..………………….......................6

I hope whether or not you submitted an entry, that you had fun with this!

thanks for doing this Dick - I had great fun. the quiz was challenging and the 'qualifying act' of posting a caseback pic on the original post is very intelligent as well - it ensures the post keeps getting floated up drawing attention to the quiz again and again.

I enjoyed it. I still like our answer for #7. LOL
I learned a few things as well which is always a good thing.

Great results - and findings. Proves the knowledge level of the forumers to be of the highest level. Thank you Dick for this one.

@ Alan, Nad and I still both love that #7 !! I like Nad still wear that watch reguarly.

Great summer quiz. Unfortunately I performed well below median in the "played at home" group. Now I am happy to look back and learn.

Dick, thank you! It was brilliant idea and I enjoyed very much!