Hetchins Magnum Bonum - 1959
| Frame |
Hetchins frame number H 27439 - Magnum Bonum 24"
road frame.
Sold 16-1-1959 as Model 4 - Road Racing - built by Stan Broom - Price
£24.9s.6d; Top tube 23", chainstays 17¼", fork rake 2½"; Campag ends with rear gear hanger; twin forged fork crown; brake cable eyes under top tube; twin lever bosses on down tube; on bottom bracket is pulley for front changer cable and a cable guide underneath for rear changer. Gear cable boss on chainstay; frame is black with violet seat tube panel and head tube. It has chrome front and rear ends, head lugs and fork crown. Lugs lined gold. |
| Wheels |
Conloy Asp 27" HP rims on Harden large flange
hubs
G/F - 15/17 spokes. Continental Tyres and Regina 5-speed block 13-26 |
| Chainset | Chater-Lea fluted two-arm cranks with Chater
double 44/38 x 3/32 using Chater converter. Chater-Lea bottom
bracket |
| Pedals | Chater-Lea with Christophe clips and straps |
| Gears | Campag Gran Sport 5-speed rear changer - Campag
Gran
Sport 1005 (2) front changer - Campag twin-levers on down tube frame
bosses. |
| Brakes | Mafac 'Dural Forge' with Mafac hooded levers |
| Stem/Bars | Titan steel 4" stem, Campag headset with bars - ‘S Maes’ – ‘M Kint’ – ‘A Schotte’ 14½” |
| Saddle | Brooks B17 Swallow |
| Extra details | When returned from the restorers, C & G
at
Liverpool, I realised I
had made a mistake in asking for the chromed head lugs to be lined. It
looked so wrong I painted out the lining where the frame was black and
I was able to match the paint. The head lining didn't look
quite
so bad and I left it as it was as it would have been difficult to match
the violet paint. |
 Campag Gran Sport (matchbox)
changer and Chater-Lea double chainring
|
 Chromed head lugs with lining at
top and down tube 'blacked out'
|
The 'A Schotte' ferrule on the Maes-Kint bars and head of Titan steel stem with the alloy bolt and nut
The Chater-Lea alloy spacer used to convert single ring to double. This rare conversion
needs longer bolts which have the unusual Chater threading of 17/64" x 25TPI Whitworth.
Chater did two versions of this spacer, the thicker one being for a tandem drive conversion.
Raised lettering is 'CHATER-LEA' 'MADE IN ENGLAND'
(Two images Horst Freidrichs)