Capt. Clarence E. “Bud” Anderson, a World War II Triple Ace with the 363rd Fighter Squadron of the 357th Fighter Group, flew 116 combat missions in his P-51 Mustang, Old Crow, achieving 16 ¼ air-to-air kills while escorting bombers over Nazi-occupied Europe. His brown leather A-2 flight jacket, worn during his first combat tour, is on loan to the National Air and Space Museum. In my role as an Engen Conservation Fellow, I conserved the jacket in preparation for display in the upcoming Jay I. Kislak World War II in the Air exhibition.

Clarence E. “Bud” Anderson (left) with Flight Instructor Klug (left middle) and fellow students (right) at flight training. Bud is wearing the A-2 flight jacket on loan to the Museum.
On April 11, 1944, Captain Anderson shared a “quarter kill” of a Luftwaffe bomber with three pilots in his squadron. From left to right, you see Lt. William “Bill” Overstreet, Lt. Henry Kayser, Anderson in the flight jacket, and Lt. Eddie Simpson being interviewed by Squadron Intelligence Officer, Capt. Ed DeNigris, after the mission.

The Jacket’s Historical Context

Leather flight jackets were standard issue for Mustang pilots like Anderson, who flew in unpressurized cockpits at 25,000 feet, where temperatures could drop below freezing. The jacket’s thick leather and knit cuffs provided essential warmth. Notably, Anderson’s jacket lacks squadron or group insignia, a precaution to protect his unit’s identity if captured, reflecting the risks of his missions. It features a replica rectangular patch stamped “C.E. Anderson” on the left breast, identifying its owner. The jacket connects to the 357th Fighter Group’s role in protecting bombers and destroying the Luftwaffe during missions over Europe.

Capt. Clarence E. “Bud” Anderson’s jacket before conservation treatment.

Condition and Conservation

Upon arriving at at the Museum, the jacket showed signs of wartime use: minor abrasions on the leather and  a sweat-stained cotton lining. Its rib-knit wool cuffs were severely damaged with holes and tears—damage likely from postwar wear, natural deterioration, or other factors. In collaboration with the Anderson family, the Museum’s curators and conservators, I opted for minimal, reversible repairs to stabilize the jacket for display while preserving its authenticity. The cuffs posed the biggest challenge—they needed to endure handling for mounting on a bespoke mannequin but retain their historical character. I chose Swiss darning, or duplicate stitching, a technique that recreates the original knit structure stitch by stitch, to repair them.

Detail of wool rib-knit cuffs with holes and losses.
Bright orange rib-knit fabric sample, created to replicate the jacket’s cuffs. Holes were intentionally made and then mended with purple yarn to practice the mending method.

To perfect this approach, I tested Swiss darning on replica rib-knit samples, cutting holes to match the jacket’s damage and practicing with contrasting yarn. For Anderson’s jacket, I selected a slightly thinner yarn in a subtle color variation to keep repairs discreet and avoid bulk. Since the cuffs are a single knit folded in half, I worked meticulously to avoid snagging the inner layer, anchoring each stitch to existing loops and tucking loose threads away. These repairs can be undone, returning the jacket’s state before treatment, if needed.

Detail of repairs in progress on the knit cuffs. From left to right: repairing runs in the knit, recreating loops with a crochet hook, and securing knitting loops with pins during Swiss darning. Gloves were not worn due to the delicate nature of the repair work—clean, bare hands allow for better assessment of the original yarn’s fragility and more consistent tensioning of the knit loops.
Detail of completed stabilization to jacket cuffs.

I left the leather’s abrasions untouched to preserve its history, while stabilizing the  corrosion on the zipper and addressing holes in the lining. The aim was not a pristine appearance but a tribute to its lived experience.

Anderson’s jacket after conservation treatment. Mounted on a bespoke mannequin.

After conservation, Bud Anderson’s flight jacket will go on display along with his flight helmet and goggles in the Museum’s Jay I. Kislak World War II in the Air exhibition on a custom mannequin near the Museum’s North American P-51D Mustang. This work preserves a piece of World War II history and reflects the service of Anderson and his fellow pilots to the United States.

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