Hey Pallewheel, I was fascinated to read this post and it raised some questions about my Sekonda 3017 and I wonder how you (and any others here) would read mine? When I bought it @Odessa200 suggested the balance bridge may have been replaced as he wasnt sure the early number fitted the later watch - It has 19Jewels in English, 3017 stamping, but bridge is a low 15509In almost all respects but the most subtle this Poljot chronograph seems to check out. Where I get hung up is with the dating. According to our esteemed Italian colleagues about 5000 Strelas were made each year. The serial number on the balance bridge gives a running total. After around serial number 15000, the anchor bridge got stamped with "3017". Note that the serial number of this watch is 14477, and there is no stamp on the anchor bridge. So OK? But then this is dialed a Poljot not a Strela (and the case is correct for a Poljot). So here's the question. Were these export Poljots made at the same time Strelas were made, or is this a franken that has a Poljot body with an earlier Strela movement (or pieces thereof, note the marking of "19 Jewels" in English on the main bridge)?
Perhaps in an un jewelled watch, the balance staff broke, easier to slot in a whole balance+bridge than repair and the watchmaker sourced an earlier bridge/balance???