Sorry for late answer, I have to made some check with GO first.
I think someone else get the most of this info to.
Regarding reference 1-38-42-07-22
In caliber 38-42 there are 44 jewels. The numbers 38-42 describe the caliber/ movement, -07 describes the dial, -22 stands for the case and -04 describes strap and clasp variations.
Within an internal rate testing all watches from our manufactory are regulated and checked. Within a precise defined time frame, with changing temperatures and in different positions determined rate tolerances shall not be passed. For caliber 38-42 the limits for the average daily rate in different positions shall be between -5 and +10 seconds a day.
The winding direction of the rotor and hence the setting for a watch winder is left/ counterclockwise. A watch winder should be set for 800 to 1200 turns per day. Before using the watch winder please wind your watch manually over the crown a few times. After coming to a standstill the watch of caliber 38-42 needs approximately 40 360°-turns over the crown to be fully wound.
Initially this watch was designed to be dispatched with the calf skin strap as the picture indicates. However, retailers have the possibility to order alternative straps if requested. As long as the link size fits different straps are an option. In our range we do offer Mississippi Alligator straps that match your watch.
There also used to be a stainless steel bracelet for your Senator AutoDate which is now sold out.
Please note that we do not communicate the exact manufacture date but the production period. So this caliber was produced between 2002 and 2006.
Your Senator AutoDate Automatic is antimagnetic up to about 4800 ampere per meter (which equals 6 militesla). For your information a watch may be named “antimagnetic” according to international norms if it does not have a rate deviation of 30 seconds per day after the influence of a magnetic field of about 4800 ampere per meter.