{"product_id":"austin-osman-spare-sidereal-postcard","title":"Austin Osman Spare 'Sidereal' Postcard","description":"\u003csection data-turn=\"user\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-1\" data-turn-id=\"a931ecb7-9fba-4b11-b4c1-9de9834ba0c3\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--header-height)\"\u003e\u003c\/section\u003e\n\u003csection data-turn=\"assistant\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-2\" data-turn-id=\"request-WEB:2dc7227f-f3f2-454c-aa48-f16ce0f4d3ed-0\" dir=\"auto\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv data-turn-start-message=\"true\" data-message-model-slug=\"gpt-5-3-mini\" dir=\"auto\" data-message-id=\"561e9f9a-54ae-4bad-92ff-35b80529bd08\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003eThis portrait-format art postcard reproduces Sidereal (1930s) by Austin Osman Spare. Printed on high-quality Invercote G board (350 gsm), the surface offers a crisp image with a subtle sheen.\u003c\/p\u003e\n\u003cp\u003eProduced by The Brown Collection in Marylebone, London, this gallery postcard accompanies the exhibition Hoi Polloi (24 September 2025 – 8 August 2026). Measuring 105 × 149 mm, it has a compact portrait format and refined finish, making it ideal for collecting, framing or sending.\u003c\/p\u003e\n\u003cp\u003eMaterial: Invercote G, single-sided board, 350 gsm \u003cbr\u003ePostcard Dimensions: 105 × 149 mm \u003cbr\u003eArtwork: Austin Osman Spare, Sidereal, 1930s, Watercolour and pencil on card, 31.8 × 22.2 cm \u003cbr\u003ePhotography: Courtesy The Brown Collection \u003cbr\u003eExhibition: Hoi Polloi, 24 September 2025 – 8 August 2026, The Brown Collection Graphic Design: Atelier Dyakova \u003cbr\u003ePrinted: Roy Killen\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"The Brown Collection","offers":[{"title":"Default Title","offer_id":53580237799763,"sku":null,"price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1065\/7434\/8627\/files\/Artboard6.jpg?v=1777128317","url":"https:\/\/the-brown-collection-shop.co.uk\/products\/austin-osman-spare-sidereal-postcard","provider":"The Brown Collection","version":"1.0","type":"link"}