It was the next model after the 1603 non quickset. It probably had several dial options. Searching on the web you can find similar looking versions but from pictures not always easy to confirm. The image below is similar but I am not an expert in this model but the font on yours is more convincing.
If you like the watch paid a reasonable price enjoy it. This is not some extremely rare unicorn variant that has a high price that a mistake is very costly.