Casio BS-61G thin LCD watch

Today's watch is another watch which is a mystery to the Internet.

The watch is by Casio, but the only Web search results seem to come from a couple of auction results, but there are no photos in the image search.

This is the model BS-61G which is probably a BS-61 with a gold coloured case. It is such a thin watch that is could probably be one of the film watch Pela models, but doesn't seem to be part of that range. It is also a narrow watch, being only 2cm wide, which is not much wider than the majority of the strap. The case is 3cm tall and has a vertical pinstripe pattern, and the overall size makes it appear to be a ladies model. The only text on the watch front (apart from the Casio name) says Auto Calendar, and as this is being advertised as a feature, I would guess it suggests an early production date. The strap is a gold coated stainless steel one with a part number of B-752N.

There are two windows with LCD displays in, with the windows being a rhombus shape (slanted towards the right). In the top window are the 4 digits for the time, and in a small window roughly halfway down the case are the seconds. Towards the bottom are two buttons. The long button makes the display show the date, with the small button for setting.

The watch uses a Casio 545 module, but I don't know what date this comes from (although I'd guess it's an 80s model).