19th C? Miniature Portrait.  Gentleman in blue jacket. Signed. Gilt metal initials verso 'AO.' Possibly French.
{"Image ImageWidth": "4928", "Image ImageLength": "3264", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image Make": "NIKON CORPORATION", "Image Model": "NIKON D7000", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image Software": "Adobe Photoshop CC 2014 (Macintosh)", "Image DateTime": "2016:10:19 08:59:04", "Image ExifOffset": "2358", "Image SensitivityType": "Recommended Exposure Index", "Image BodySerialNumber": "8154467", "Image LensSpecification": "[40, 40, 14/5, 14/5]", "Image LensModel": "40.0 mm f/2.8", "Image Padding": "[]", "EXIF ExposureTime": "1/250", "EXIF FNumber": "13", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "250", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2016:10:10 17:09:37", "EXIF DateTimeDigitized": "2016:10:10 17:09:37", "EXIF ShutterSpeedValue": "995723/125000", "EXIF ApertureValue": "7400879/1000000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "16/5", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "40", "EXIF SubSecTimeOriginal": "60", "EXIF SubSecTimeDigitized": "60", "EXIF ExifImageWidth": "1500", "EXIF ExifImageLength": "1500", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CVAPattern": "[2, 0, 2, 0, 0, 1, 1, 2]", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "60", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "None", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0", "EXIF Padding": "[]"}