Average GPS coordinates for Gwalchmai Postcode location: 53.25, -4.417. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Gwalchmai on map:

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Listing cities & postcodes (1):
>> Anglesey, LL65 Gwalchmai, Wales, GPS coordinates: 53.25,-4.4167