Here are the registration or “USA Number” of the G518/G529 trailers by manufacturer. If you are missing the data plate but can make out this number then you can identify who built your trailer.
| 009031-014238 | Levine Gear (may be Ben-Hur Mfg. Co.) |
| 024139-039138 | Nash-Kelvinator |
| 039511-043006 | Levine Gear (may be Ben-Hur Mfg. Co.) |
| 043044-043047 | Levine Gear (may be Ben-Hur Mfg. Co.) |
| 043540-045289 | Ben-Hur Mfg. Co. (may be Levine Gear) |
| W-045307 to W-046546 | Ben-Hur Mfg. Co. (water trailer) |
| 049711-054710 | Nash-Kelvinator |
| W-056628 to W-057292 | Ben-Hur Mfg. Co. (water trailer) |
| 059395-061394 | Nash-Kelvinator |
| W-064498 to W-064922 | Checker Cab Company (water trailer) |
| 069186-090785 | Nash-Kelvinator |
| 0100357-0100498 | Ben-Hur Mfg. Co. (water trailer) |
| 0108343-0116432 | Ben-Hur Mfg. Co. |
| 0116437-0123346 | Ben-Hur Mfg. Co. |
| 0123362-0128361 | Checker Cab Company |
| 0128862-0129361 | Checker Cab Company |
| 0131709-0132774 | Checker Cab Company (water trailer) |
| 0174769-0176371 | Ben-Hur Mfg. Co. |
| 0293083-0295582 | Checker Cab Company (water trailer) |
| 0295583-0310358 | Checker Cab Company |
| 0325742-0355741 | Gerstenslager |
| 0356338-0356837 | Checker Cab Company (water trailer) |
| 0361124-0377047 | Checker Cab Company |
| 0381083-0395858 | Willys-Overland |
| 0399083-0417082 | American Bantam |
| 0424772-0449431 | Ben-Hur Mfg. Co. |
| 0449590-0452128 | Ben-Hur Mfg. Co. (water trailer) |
| 0452170-0452223 | Ben-Hur Mfg. Co. (water trailer) |
| 0486009-0487008 | Checker Cab Company (water trailer) |
| 0494550-0495748 | Springfield Wagon & Trailer (water trailer) |
| 0495749-0496748 | Ben-Hur Mfg. Co. (water trailer) |
| 0496773-0500272 | Winter-Weiss |
| 0500273-0502713 | Hobbs |
| 0503273-0504540 | Omaha Standard Body |
| 0505023-0506772 | Henny |
| 0506773-0508258 | Strick |
| 0509273-0510472 | Strick |
| 0510473-0511518 | Nabors |
| 0512723-0515822 | Truck Engineering Corporation |
| 0515823-0516874 | Mifflinberg |
| 0517211-0518710 | Redman Trailer |
| 0518711-0519910 | Century Boat Works |
| 0519911-0521832 | Pike Trailer |
| 0521911-0524346 | Queen City |
| 0524711-0526952 | Highland Body and Trailer |
| 0527511-0530110 | Hercules Body |
| 0539822-0541321 | Transportation Equipment |
| 0541322-0543321 | Steel Products |
| 0543322-0544321 | Dorsey Brothers |
| 0557987-0559040 | Ben-Hur Mfg. Co. (water trailer) |
| 0559041-0560213 | Checker Cab Company (water trailer) |
| 0560718-0566717 | Gerstenslager |
| 0575500-0580411 | Gerstenslager |
| 0592113-0592699 | American Bantam |
| 0601113-0601122 | Hyde |
| 0603013-0605437 | Ben-Hur Mfg. Co. |
| 0605438-0606245 | Ben-Hur Mfg. Co. |
| 0613765-0615527 | Checker Cab Company |
| 0637936-0638247 | Dorsey Brothers |
| 0720253-0720283 | Ben-Hur Mfg. Co. (water trailer) |
| 0816131-0817438 | Ben-Hur Mfg. Co. (water trailer) |
| 0834762-0835795 | Ben-Hur Mfg. Co. (water trailer) |
| 0835878-0835896 | Ben-Hur Mfg. Co. (water trailer) |
| 0860688-0863687 | Ben-Hur Mfg. Co. |
| 0863688-0866187 | Hercules Body |
| 0866188-0866252 | Keystone |
| 0868388-0870658 | Baker War Industries |
| 0874125-0875117 | Ben-Hur Mfg. Co. (water trailer) |
| 0927752-0927755 | Hercules Body |
| 0941356-0943242 | Hercules Body |
| 0961079-0961158 | Ben-Hur Mfg. Co. (water trailer) |
| 0961313-0961654 | Springfield Wagon & Trailer (water trailer) |
| 0961954-0962413 | City Tank (water trailer) |
| 0962414-0962852 | Davis Welding (water trailer) |
| 0974824-0975219 | Ben-Hur Mfg. Co. |
| 0982315-0984041 | Hobbs |
| 0992630-0992762 | Century Boat Works |
| 01092339-01092762 | City Tank (water trailer) |
| 01106063-01107582 | Ben-Hur Mfg. Co. (water trailer) |
| 01107583-01107841 | Davis Welding (water trailer) |
Registration number data from Lloyd White and posted on the CCKW.org site, shared with permission.