Welcome to the Wincharger forum. There are 6v part diagrams on the website under the resource menu, link below. I’ll post a pic of the hardware a little later. If it is a model 39, then it was mfg about 1939. They may have produced the 39 into the 1940s for export. If you can post or email pics I can verify your model. Pics posted on the forum can’t exceed 150kb so email might be easier. You can use the website email or my email listed in resources/part suppliers, Wind Charger Mike.
https://wincharger.com/index.php/resources/6v-part-diagrams