Here is a picture of the original style rear seal for the MGA mid 1500 type gearbox. Originally it had felt and wide leather seal, later changed to felt and wide rubber seal (as shown in this picture).

Original BMC part no. 1H3339
Com (G) A101 (mid 1500 cars)
Fin last gearbox before (E) GD101
(not for late 1500 and later cars)

      Illustration below is an aftermarket style with felt and a rubber lip seal.

NAPA 550095 or UNSPSC 31411705 Felt & Double lip rubber

Replacement seals commonly supplied may be simple rubber lip seal with no felt dust seal. These are not very good for this application. When the shaft moves endwise while rotating it needs the felt seal to prevent pushing dirt into the primary seal. Also the single rubber lip seal does not hold up well to sliding action of the shaft.

There will be many cross reference parts satisfying the dimensions for ID and OD. Some of the referenced seals may be narrower (especially when lacking the felt dust seal). If used, these should be installed flush with the back edge of the rear housing.

The original 1H3339 seal in felt and leather or felt and wide rubber is no longer available, except possibly as a few rare New Old Stock parts hiding in old inventory. Some modern replacements may have felt and rubber lip seals, but more likely most of the modern seals will have double rubber lip seals as shown above. Any of these styles may be found in stock under the part numbers listed here. The search is likely to be pot luck. If you find one you like, buy a few spares, because it may be different next time you need one.

Direct Cross Interchange: ABC 71550095 APAX S4907 APAX S4911 APAX S5033 Bearings Inc 1488725 BECK/ARNLEY 0523648 BMC 11G3211 BMC 11G3270 BMC 13H5843 BMC 1H3339 BMC 22H3309 BMC 27H3309 BMC 601160 BMC 9891 BMC C9891 CHRYSLER 9102074 CHRYSLER MD950807 CHRYSLER T3460 CR 516080 CR 550073 CR 5500955 Daimler-Benz 9891 Delco Moraine 293224 EATON X13089 FORD 204E7657 FORD 211E7657A FORD P211E7657A FREIGHTLNR CHR550095 ISUZU 0099243130 L&S Bearing 71550095 L&S Bearing A45471S L&S Bearing A45495 L&S Bearing A45534 MITSUBISHI MD950807 NAPA 47579 NAPA 550095 NATIONAL 1097 NATIONAL 1097N NOK AD2002E NOK AD2002E0 PAYEN B430 PAYEN NA121 Precision Seals & Bearings 1097N REPCO 11709 REPCO 2114520 REPCO P4520 REPCO PR4501 REPCO PR4776 REPCO PR5535 REPCO PR6199 SEALED POWER N550095 SKF Automotive OS550095 SKT 40224 STEFA S4002 STEFA S4457 TIMKEN 1097N TROSTEL A45495 UNSPSC 31411705 VERA 6501984 VICTOR 44020 VICTOR 44025 VICTOR 47579 VICTOR 66830 VOLVO 235728 VOLVO 2357283 WESTON WL134 WESTON WRD26

Indirect Cross Interchange: ATP RO4 ATP RO47 ACDelco 293224 BAP/GEON B430 BECK/ARNLEY 0520403 BRITISH LEYLAND 11G3211 BRITISH LEYLAND 11G3270 BRITISH LEYLAND 1H3339 CHICAGO RAWHIDE 516080 CHICAGO RAWHIDE 550073 CHICAGO RAWHIDE 550095 CORTECO 19033610B DT Components 1097N DT Components 1987 DT Components 2443 ITM B430 ITM P4520 ITM PR4501 ITM PR4776 ITM PR5535 ITM PR6199 MOPAR PARTS T3460 NATIONAL 1987 NATIONAL 2443 PAYEN NA1622 PARTS PLUS P1987 PRECISION AUTOMOTIVE INDUSTRIES 1987 Precision Seals & Bearings 1987 Precision Seals & Bearings 2443 SKF 13527 SKF 13568 SKF 14773 SKF 516080 SKF 550073 SKF 550095 SPIREX S1987 TRANSTEC B29065 TRANSTEC B29872

Applications: Dodge Colt 1971 - 1975 Isuzu I-Mark 1981 - 1984 Isuzu Impulse 1983 - 1988 Isuzu P'up 1981 - 1987 Jaguar J-6 1974 - 1979 Metropolitan Series 1500 1957 - 1962 MG MGA (mid) 1500 1956 - 1958 Plymouth Cricket 1971 - 1973 Volvo 122S 1960 - 1968 Volvo 142 1967 - 1974 Volv 144 1967 - 1974 Volvo 145 1968 - 1974 Volvo 164 1969 - 1975