It occurred in the changing rooms of The Hydro, Jennyfields Drive, at 1.45pm on Saturday 16 March 2013
The thief stole a beige snakeskin Episode purse containing money and a black Montblanc pen.
PC David Minto, of Harrogate Safer Neighbourhood Team, said:
I need to speak with anyone who was using the changing rooms at the time and may have witnessed someone acting suspiciously and ask that they contact the police straight away.
I also need to speak to anyone who may have been offered the pen or purse for sale and ask them to get in touch.
Anyone who can help the police with their enquiries is asked to contact Harrogate police on 101, press option 2 and ask for David Minto. Alternatively information can be emailed to email@example.com
Or call Crimestoppers anonymously on 0800 555 111 quoting reference number 12130042580.