estateRUTH.

Identification

Magnolene Ford Oil Porcelain Enamel Flange Sign

Photo reference

1 uploaded photo

Overview

Identified as a Magnolene Ford Oil flange sign. The specific advertising copy 'REDUCES VIBRATION' and 'FOR FORDS ONLY' targets the Ford Model T planetary transmission, which required specialized oil to prevent band chatter.

Story

Magnolia Petroleum Company was a major early 20th-century oil company based in Texas, eventually merging into Socony-Vacuum (Mobil). The 'Magnolene' brand was their flagship lubricant line. This specific sign dates to the 1910s-1920s, explicitly targeting the Ford Model T's unique planetary transmission, which required specialized oil to prevent band chatter. Petroliana remains one of the strongest and most liquid categories in advertising collectibles.

Maker / Origin

Magnolia Petroleum Company

Condition & Value

The front displays striking cobalt blue and white enamel, but the overall condition grade cannot be fully established without seeing the reverse side and the mounting flange. Flange signs typically suffer the most wear on the bent mounting edge and the 'weather-facing' side.

Full Research

See what it's actually worth.

Sold comps, value drivers, and venue guidance pulled from recent auction results.

Market Analysis

Petroliana remains one of the strongest and most liquid categories in advertising collectibles. Early automotive pieces, especially those tied to the Model T era and specific mechanical needs, have robust crossover appeal between oil/gas collectors and early Ford enthusiasts. Flange signs are highly desirable due to their displayability, but buyers are extremely condition-sensitive, often relying on third-party grading to establish top-tier values.

Value Drivers

▲ Exact match to the highly desirable Magnolene 'For Fords Only' advertising campaign.

▲ Flange sign format is highly sought after by petroliana collectors for its wall-mounting display appeal.

▲ Crossover collector appeal between early Ford Model T enthusiasts and general oil/gas advertising buyers.

Concerns

▼ Unseen reverse side — flange signs often have one side significantly more weathered than the other, which could drop the value if heavily chipped.

▼ Unverified flange condition — rust, bending, or metal loss at the mounting bracket severely impacts structural integrity and grade.

▼ Lack of third-party authentication (e. g., TAC) may limit bidding from top-tier collectors.

Best Venue

Submit the sign to a specialized petroliana and advertising auction house such as Morphy Auctions, Matthews Auctions, or Aumann Auctions. Consider obtaining third-party authentication and grading (such as TAC) prior to sale, as authenticated pieces consistently realize a 20-30% premium. Ensure high-resolution photos of both sides and the flange are included in any listing.

Upside Potential

If the reverse side matches the front in high-grade condition (8. 5 or better) and the mounting flange is perfectly straight with minimal rust, the sign could exceed $2,200 at a specialized petroliana auction, especially if professionally authenticated.

Authenticity Risk

medium

Porcelain petroliana signs are heavily reproduced due to their high market values. While the described wear and design appear consistent with period manufacturing, the lack of detailed photos showing the mounting flange grommets, edge shelving (layering of the porcelain), and a maker's mark necessitates physical verification or third-party authentication before a high-value sale.

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Also found — market-range context

Related comps outside the valuation band· 12 comps

Surfaced during research but not used to anchor the valuation — wrong form, species, era, or no published price. Shown so the market range around this item is visible.

  • Morphy Auctions· 2018-10-08
    RARE MAGNOLIA GASOLINE & SOCONY MOTOR OIL PORCELAIN CURB SIGN WITH SOCONY SHIELD GRAPHIC
    Curb sign, completely different form from a flange sign.
    $5,938
  • Morphy Auctions· 2015-10-05
    MAGNOLENE FORD OIL "SOLD HERE" SIGN
    Link could not be verified.
    $5,700
  • Central Treasures· 2022-12-15
    Awesome Magnolia Petroleum Company Porcelain Sign
    General Magnolia Petroleum sign, not the specific Ford Oil flange sign.
    $3,100
  • Studebaker's Vintage Treasures
    Magnolene Ford Oil Porcelain Flange Sign 1930s 16 x 22.5
    Link could not be verified.
    $2,800
  • Primarily Petroliana Shop Talk· 2011-04-20
    Magnolia Petroleum Company w/ring (Magnolene Motor Oils)
    Round sign mounted in a hanging ring, not a flange sign.
    $1,600
  • Morphy Auctions
    MAGNOLIA MAGNOLENE MOTOR OILS FOR SALE HERE PORCELAIN SIGN
    Not specific to Ford Oil and does not specify flange form.
    $1,560
  • Central Treasures· 2020-08-20
    Porcelain Magnolia Petroleum Sign - Double Sided
    General Magnolia Petroleum sign, not the specific Ford Oil flange sign.
    $980
  • Oil Capital Collectibles· 2025-08-05
    Magnolene Ford Oil Sold Here Porcelain Flange Sign
    Sale on record but hammer price not published.
    No price
  • Millers Auction Co.· 2023-03-06
    PORCELAIN FLANGE SIGN MAGNOLENE FORD OIL SOLD HERE
    Sale on record but hammer price not published.
    No price
  • Aumann Auctions
    Magnolene Ford Oil DSP flange sign
    Sale on record but hammer price not published.
    No price
  • Route 32 Auctions· 2022-08-04
    Magnolene Ford Oil Flange Sign
    Sale on record but hammer price not published.
    No price
  • LiveAuctioneers· 2026-02-18
    MAGNOLENE MOTOR OIL FOR FORDS PORCELAIN FLANGE SIGN
    Sale on record but hammer price not published.
    No price