This question is and easy and difficult at the same time.
Both watches are resuming older models of the early eighties. These older original models differ from each other. For example, Cal 8981 has measurement sampling time switching function. Cal. 8980 and Cal. 8982 has Centigrade – Fahrenheit switching functions. No switching was possible between Centigrade and Fahrenheit thermometers with Cal. 8981.
That is interesting the Cal. 8984 had all these functions at the same time !
All these models have also different thermistors deployed.
They have water resistance to 100 meters. Unfortunately, in later Models such as JG2032 and JG2000 have waterproof up to 40m :/
Depending on what basis were produced JG2032-52E and JG2000-59F, they can differ the above-mentioned parameters. For this reason, your question is not quite simple…
Thank you very much…..
Is an interesting story….
Everything is good but you’re talking about prototypes JG2032 and JG2000. I understand that Cal 8980-89 from the eighties were the prototype for these watches from the nineties. They may have the same features. I am partly satisfied with your answer, but, however, I would like to read about exactly these models.
This is actually a difficult question :)