Average GPS coordinates for Old Lyme Postcode location: 41.335, -72.309. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Old Lyme on map:

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Listing cities & postcodes (1):
>> Connecticut, 06371 Old Lyme, New London, GPS coordinates: 41.3347,-72.3086