A pulp-SF technical cutaway plate, full cross-section (not an explosion): a crawler tollbooth organ built into a web-tunnel wall — a turnstile of brass baffles, a coin-gullet swallowing micro-payments, a permission valve, and one visibly organic component: a soft sphincter membrane that opens only for paying readers. Dense linework, every fastener present; numbered legend down one side; black linework with phosphor green second ink on warm off-white stock, registration marks, slight misregistration. Parts-list joke: one part labeled as a complaints slot, welded shut. 4:5 portrait, Bureau filing layer over the frame, in-image lettering German or illegible.