Which Clear Pyrex casseroles use the same lid?  

From the 1910s to the 1930s, certain pairs of casseroles, bean pots and refrigerator dishes were designed with the same diameters, so one lid will fit two sizes.  Most often the lid is marked with both model numbers.  But if one casserole was introduced or discontinued earlier than the other, lids with a single model number will also exist, and they will still fit both casseroles.  The same lid can be marked three different ways: a single number matching the earlier casserole, or the later one, or two combined numbers relating to both of them.

193 (1 Qt) oval casserole and lids: 193-197, 293-297.  The latter is a Victor cover.  Both lids are designed to fit a 197 (1½ Qt) casserole too.

For example, 100 and 170 round casseroles are the same diameter and use the same lid.  The 100 was marketed for at least five years before the 170 arrived, so until 1921 this size of lid was marked only with "100".  While both casseroles were produced at the same time, the lid was numbered "100-170".  After one or two years, the 100 was discontinued, but 170 remained on the market up to 1926.  Lids produced during the latter period might be marked only with "170", but they are the same size & shape as older lids numbered "100", or "100-170".

Until the mid 1920s, round & oval casseroles had recessed rims that were designed for a lid that is flat on the underside and rests entirely inside the casserole's rim.  In this case, the lid's diameter is always smaller than the diameter of the casserole, by about ½".

Casseroles were modified in 1926.  Aside from developing handles and switching model numbers, their rims were straightened and their lids became double-rimmed to sit on top of the casserole.  With this more modern design, both lid and casserole are equal in diameter.

The rims and lids of bean pots and the individual round casserole were similarly changed in the late 1920s, but these items were not assigned new model numbers.  Although a lid might bear the correct number (502, 504, 506, or 164), it must also be the right type and the same age to be compatible with a particular bean pot or individual casserole.

Newer 502 bean pot (lid not shown), older 164 individual round casserole.  The 164's lid is numbered 502, but because of the age difference, it does not fit this 502.

- mid 1910s to mid 1920s - 

100 & 170 
A 100 is a basic round casserole, and 170 is a Standard round casserole.  Having similar depths, they both hold 2½ Qt.  When both numbers appear on the lid, it is expressed as: 100-170.  A 270 Victor cover also fits a 170, but the 100 casserole was not sold with this type of lid.

101 & 169 
A 101 is a basic round casserole, and 169 is a Standard round casserole.  Having similar depths, they both hold 2 Qt.  When both numbers appear on the lid, it is expressed as: 101-169.  A 269 Victor cover also fits a 169, but the 101 casserole was not sold with this type of lid.

102 (1½ Qt) round casserole with 102-113 lid, 113 (1½ Qt) shallow round casserole underneath.

102 & 113 
A 102 is a basic round casserole, and 113 is a shallow round casserole.  Although they have different depths, both hold 1½ Qt because a shallow 113 is more straight-sided than a deep 102.  When both numbers appear on the lid, it is expressed as: 102-113.

164 & 502 
A 164 is an 8 oz round individual casserole, and 502 is a 16 oz individual bean pot, or Petite Marmite.  When both numbers appear on the lid, it is expressed as: 164-502.  Alterations in the late 1920s mean that newer 164s and 502s use a different lid that is not meant to be used with an older 164 or 502.

504 or 506 bean pot, 502 Petite Marmite.  Image from 1924/1925 booklet.

167 & 506 
A 167 is a 1 Qt round Standard casserole, and 506 is a 2 Qt bean pot.  When both numbers appear on the lid, it is expressed as: 167-506.  A 267 Victor cover also fits a 167, but the 506 bean pot was not sold with this type of lid.  Alterations in the late 1920s mean that newer 506s use a different lid that is not meant to be used with an older 506.

193 & 197 
Both 193 (1 Qt) and 197 (1½ Qt) are classified as deep oval casseroles, but 197 is the deeper of the two.  When both numbers appear on the lid, it is expressed as: 193-197.  They were also sold with a Victor cover: 293-297.

- late 1920s to late 1930s -  

021 & 504 
An 021 is a ½ Qt round casserole, and 504 is a 1 Qt bean pot.  When both numbers appear on the lid, it is expressed two possible ways: 621-C-OR-504-C, and 621-OR-504-C.  504s manufactured before the late 1920s use a different lid that will not fit a newer 504.

022 round casserole and lid, 622-OR-506-C.

022 & 506 
An 022 is a 1 Qt round casserole, and 506 is a 2 Qt bean pot.  When both numbers appear on the lid, it is expressed two possible ways: 622-C-OR-506-C, and 622-OR-506-C.  A 682 flat top utility lid also fits an 022, but the 506 bean pot was not sold with this type of lid.  506s manufactured before the late 1920s use a different lid that will not fit a newer 506.

033 & 042 
An 033 (1½ Qt) is a deep oval casserole, and 042 (1 Qt) is a shallow oval casserole.  When both numbers appear on the lid, it is expressed two possible ways: 633-C-OR-642-C, and 633-OR-642-C.  They were also sold with a flat top utility lid: 602-613-C.

034 & 043 
An 034 (2 Qt) is a deep oval casserole, and 043 (1½ Qt) is a shallow oval casserole.  When both numbers appear on the lid, it is expressed two possible ways: 634-C-OR-643-C, and 634-OR-643-C.  They were also sold with a flat top utility lid: 603-614-C.

034 deep oval casserole and lid, 634-OR-643-C.

164 & 502 
A 164 is an 8 oz round individual casserole, and 502 is a 14 oz individual bean pot, or Petite Marmite.  When both numbers appear on the lid, it is expressed as: 164-OR-502-C.  164s and 502s manufactured before the late 1920s use a different lid that will not fit newer 164s or 502s.

592 & 212 
A 592 (5 x 9 x 2") is a shallow rectangular refrigerator dish, and 212 is a loaf pan (5 x 9 x 3") that becomes a 593 refrigerator dish with the addition of a lid.  When both numbers appear on the lid, it is expressed two possible ways: 592-593, and 592-593-C.

662 & 663  
A shallow 662 (6 x 6 x 2") and a deep 663 (6 x 6 x 3") are square refrigerator dishes.  When both numbers appear on the lid, it is expressed two possible ways: 662-663, and 662-663-C.

593, 662, 663, 592 refrigerator dishes.  Image from 1925 booklet.


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