{"type":"firestarter.listing","listing":{"id":"lst_G8totEKO","product_name":"Model 20 Marietta Fountain Pen - BTAG SE","category":"Fountain Pen - Model 20","description":"\n This is the original piece in our \"BTAG\" aesthetic - with black cap, tiger red section, and \"antique glass\" acrylic barrel. Keep in mind when you purchase that the antique glass material can micro fracture in the material giving it more of a frosted look in some parts over time. This version only offered with clip. $185 USD♦ Presenting the Model 20 Marietta - a slip cap fountain pen that harkens back to the aesthetic of classic fountain pens of yesteryear. ♦ Precision machining and design create a cap that securely and firmly fits to the the section and barrel with a firm grip. When capped or posted properly it is impossible to sling the cap off, so can be securely used in a shirt pocket or pen pouch. ♦ No exterior threads and no shoulder from grip section to barrel. ♦ The pressure is distributed inside the cap and away from the lip to prevent lip cracking. ♦ The interior of the cap has a feature that releases air pressure to eliminate the vacuum that causes ink spurts on the nib when uncapping. ♦ Filled 3 ways, via disposable cartridge, piston converter, or the eye dropper method. ♦ #6 Size nib - with many tip options in factory or custom ground. ♦ Lifetime warranty,  converter, sample cartridges, and a 30 day money back guarantee are all included. Made in USA. ♦ Shipped in a Franklin-Christoph zippered pen pouch with an outer white thin box. \n \n♦ Dimensions:  5.0\" from nib tip to barrel end = 127mm5.45\" capped length = 138.43mm\n 5.88\" cap posted length from nib tip to cap top = 150mm2.175\" cap = 55.25mm.575\" cap diameter = 14.61mm.51\" barrel diameter = 12.95mm.41\" smallest diameter of grip section = 10.41mm ♦ Weight with converter inserted but not ink is: .68oz or 19.28grams. \n\n\n\n ♦\n ♦\n\n\n\n ♦\n\n\n\n ♦\n\n\n\n\n\n\n","images":["https://cdn.shopify.com/s/files/1/0023/7679/4187/files/20MTAGB.jpg?v=1715972275"],"price":170,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:47:20.684Z"},"share_url":"https://firestarter.network/l/lst_G8totEKO","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_G8totEKO' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Model 20 Marietta Fountain Pen - BTAG SE' and a budget_max comfortably above $170.00 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}