This watch is a recent arrival, bought from eBay UK. I was interested to find this one since it is an export model using a 5400 movement, and not marked with a model name. Whilst watches for the Japanese market with this movement were named ‘Crystal Date’, ‘Compact’ or ‘540 Autodater’ , the export model simply carries the Citizen logo:

I was also interested in this example since it is a 54 model – previously I’d only seen this model with the later 74 movement – so it is quite unusual. The case number helps to identify the movement used, whilst the serial number gives a production date of October 1970 (late for a 54 series movement). The back is marked ‘parawater’ rather than ‘waterproof’ as on the dial:

The dark grey dial is framed by an oval case, which is nicely brushed, and this has survived the years without any scratches. The crystal is mineral glass rather than acrylic, as used in the Crystal Date and Crystal Seven models and again has survived without major trauma. The date wheel is printed red, as used on some of the 150m divers of the period whilst the hands are disappointingly very simple and plain: